[python] Semgrep grammar augmentation - pattern parsing fixes

[brandonspark]

Summary

Generated artifacts for Python grammar augmentation that fixes parsing of canonical Semgrep pattern idioms. Source change is in ocaml-tree-sitter-semgrep#577.

Tickets fixed

• LANG-460 - ... in a function parameter list (def $F(...): ...)
• LANG-461 - $...ARGS variadic metavariable in call argument lists
• LANG-463 - typed metavariable ($X : T)
• LANG-464 - ... inside match / case class/list/tuple/dict patterns
• LANG-465 - ... as an element of a dict literal

Tickets deferred

• LANG-462 - deep ellipsis (needs scanner work, tracked separately).

Provenance

Generated by ./release --branch fix/python-pattern-augmentation python from ocaml-tree-sitter-semgrep PR #577 (commit 246f276).

Test plan

• CI green
• Tracking PR in ocaml-tree-sitter-semgrep merges first