python3-packaging: upgrade 26.2 -> 26.3

From: Tim Orling <tim.orling@konsulko.com>

For full comparison of changes (134 commits, 73 files changed), see:
https://github.com/pypa/packaging/compare/26.2...26.3

Upstream release notes:
https://packaging.pypa.io/en/stable/changelog.html
26.3 - 2026-08-03

Features:

* Add a public VersionRange API and SpecifierSet.to_range(), representing
  the versions a specifier set accepts as an interval set that supports
  intersection, union, difference, complement, set relations, membership
  tests, and filtering. to_specifier_set() converts a range back to a
  SpecifierSet where a PEP 440 form exists. (PR #1267, PR #1270, PR #1298)
* PEP 808: accept Metadata-Version: 2.6. (PR #1194)
* Add a limit argument to parse_tag() for compressed tag sets. (#1220)
* Add a prefer_sdist_predicate argument to Pylock.select() to prefer
  source distributions over wheels for selected packages. (PR #1334)
* Add pure_python_tags() to generate the pure-Python tags for a Python
  version without touching the running platform. (PR #1346)
* Add SpecifierSet.is_subset(), is_superset(), and is_disjoint(), which
  compare the versions two specifier sets accept. (PR #1313)

Behavior adaptations:

* Drop support for Python 3.8; packaging now requires Python 3.9 or
  later. (PR #1157)
* Prefer native linux_* platform tags over manylinux and musllinux tags
  on Linux. (#160)

Fixes for versions and specifiers:

* Raise InvalidVersion instead of TypeError when Version is given a
  non-string. (PR #1319)
* Raise InvalidVersion for non-string pre-release letters passed to
  Version.from_parts. (PR #1241)
* Fix an AttributeError when hashing internally trimmed versions.
  (PR #1242)
* Fix SpecifierSet.is_unsatisfiable for post-release boundary
  intersections. (PR #1257)

Fixes for requirements and markers:

* Make Requirement.__hash__ consistent with __eq__ for
  trailing-zero-equivalent specifiers (e.g. foo==1.0.0 and foo==1.0.0.0),
  so equal requirements hash equal and deduplicate in sets and dicts.
  (PR #1232)
* Normalize requested extra names before comparing or hashing
  requirements. (#644)
* Preserve a Requirement’s specifier prereleases override across a pickle
  round trip. (#1204)
* Raise InvalidRequirement instead of InvalidSpecifier when a requirement
  contains an invalid specifier. (PR #1332)
* Clarify the error for post-release prefix wildcards like ==1.0.post1.*.
  (PR #1299)
* Preserve quoting semantics when serializing marker values, so
  round-tripped markers parse back to the same marker. (PR #1213)
* Keep the parentheses of a nested group when serializing markers.
  (PR #1316)
* Normalize extra and dependency_groups values in nested markers at parse
  time. (PR #1246, PR #1310)
* Raise UndefinedComparison when a set-valued variable like extras is used
  outside the membership form. (PR #1265)
* Raise UndefinedEnvironmentName (a KeyError subclass) for missing
  environment keys during marker evaluation. (PR #1276)
* Wrap malformed string literal errors in InvalidMarker /
  InvalidRequirement instead of leaking a low-level error. (PR #1249)
* Reject requirements and markers with a trailing line break. (PR #1345)

Fixes for metadata and licenses:

* Collect all from_email validation errors into one ExceptionGroup instead
  of raising the first. (PR #1268)
* Accept the UTF-8 charset case-insensitively in email payloads. (PR #1330)
* Reject malformed Description-Content-Type values. (PR #1329)
* Don’t rewrite user values that contain {field} placeholders in error
  messages. (PR #1327)
* Route multipart email payloads to unparsed instead of asserting.
  (PR #1247)
* Make InvalidMetadata and CyclicDependencyGroup picklable. (PR #1328)
* Fold every line boundary str.splitlines recognizes when writing a header
  with RFC822Message. (PR #1356)
* Raise InvalidLicenseExpression for misplaced WITH clauses and empty
  LicenseRef- names. (PR #1266)
* Raise InvalidLicenseExpression instead of KeyError for a LicenseRef-
  with a + suffix. (PR #1219)

Fixes for tags and filenames:

* Raise InvalidTag from parse_tag() for tags with the wrong number of
  components. (PR #1238)
* Reject empty tag components in parse_wheel_filename() and parse_tag().
  (PR #1234)
* Reject an empty project name in the wheel and sdist filename parsers.
  (PR #1305)
* Reject wheel filenames with a trailing newline. (PR #1341)
* Reject wheel tags whose interpreter component is not an identifier.
  (#577)
* is_normalized_name now rejects names with collapsed double hyphens
  like a--b. (PR #1230)
* Fix duplicate explicit abi3t tags. (PR #1245)
* Forward the warn argument to generic_tags() in sys_tags(). (PR #1264)
* Raise SystemError for an empty or malformed CPython EXT_SUFFIX.
  (PR #1271, PR #1301)
* Fix a typo in the macOS fat3 architecture name (was fat32). (PR #1199)
* Fixes for pylock, direct URLs, and dependency groups:
* Percent-decode pylock artifact file names derived from a url so that
  local versions (e.g. a wheel with 2.12.1+cu130 encoded as
  2.12.1%2Bcu130) yield a valid file name. (PR #1314)
* Use an explicitly empty tags sequence in Pylock.select() instead of
  falling back to sys_tags(). (PR #1349)
* Fix Pylock.select() on Python builds that report a non-PEP 440
  python_full_version (e.g. 3.15.0+). (PR #1179)
* Reject TOML booleans where integers are expected in pylock files.
  (PR #1244)
* Add PylockSelectError to packaging.pylock.__all__.
  (PR #1202)
* Fix DirectUrl credential stripping for passwords containing @.
  (PR #1218)
* Parse the URL scheme case-insensitively when checking for file URLs in
  direct_url. (PR #1240)
* Require absolute file URLs for local directories in direct_url.
  (PR #1297)
* Collect InvalidRequirement errors while resolving dependency groups
  instead of leaking them. (PR #1302)
* Don’t cache malformed dependency group parses. (PR #1248)

[Truncated, see "Upstream release notes" link above for the full changelog]

Signed-off-by: Tim Orling <tim.orling@konsulko.com>
---
All ptests pass on qemux86-64 for core-image-ptest-python3-packaging

Testsuite summary
TOTAL: 62785
PASS: 62785
SKIP: 0
XFAIL: 0
FAIL: 0
XPASS: 0
ERROR: 0
DURATION: 425

 .../{python3-packaging_26.2.bb => python3-packaging_26.3.bb}    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename meta/recipes-devtools/python/{python3-packaging_26.2.bb => python3-packaging_26.3.bb} (94%)