[ty] Add tests for protocols with generic method members

[AlexWaygood]

Summary

Protocols can have method members, and those method members can have generic contexts. The generic context of a protocol's method members can be scoped to the class or the method itself.

We currently have some "accidental integration tests" for generic method members in our named-tuple test suite, but no explicit unit tests in protocols.md. This PR adds them.

Test Plan

cargo test -p ty_python_semantic --test=mdtest

[sharkdp]

Looks good, thank you.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

ℹ️ ecosystem check detected linter changes. (+265 -0 violations, +0 -0 fixes in 2 projects; 53 projects unchanged)

apache/airflow (+3 -0 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --ignore RUF9 --no-fix --output-format concise --preview --select ALL

+ providers/common/sql/src/airflow/providers/common/sql/hooks/sql.pyi:112:10: UP043 [*] Unnecessary default type arguments
+ providers/common/sql/src/airflow/providers/common/sql/hooks/sql.pyi:146:10: UP043 [*] Unnecessary default type arguments
+ providers/common/sql/src/airflow/providers/common/sql/hooks/sql.pyi:156:10: UP043 [*] Unnecessary default type arguments

python/typeshed (+262 -0 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --ignore RUF9 --no-fix --output-format concise --preview --select E,F,FA,I,PYI,RUF,UP,W

+ stdlib/argparse.pyi:315:60: UP043 [*] Unnecessary default type arguments
+ stdlib/codecs.pyi:198:83: UP043 [*] Unnecessary default type arguments
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+ stdlib/email/message.pyi:133:23: UP043 [*] Unnecessary default type arguments
+ stdlib/lib2to3/fixes/fix_except.pyi:9:42: UP043 [*] Unnecessary default type arguments
+ stdlib/lib2to3/fixes/fix_import.pyi:8:32: UP043 [*] Unnecessary default type arguments
+ stdlib/lib2to3/fixes/fix_imports.pyi:11:35: UP043 [*] Unnecessary default type arguments
+ stdlib/lib2to3/fixes/fix_metaclass.pyi:11:29: UP043 [*] Unnecessary default type arguments
+ stdlib/lib2to3/fixes/fix_renames.pyi:10:24: UP043 [*] Unnecessary default type arguments
+ stdlib/lib2to3/fixes/fix_urllib.pyi:8:24: UP043 [*] Unnecessary default type arguments
+ stdlib/lib2to3/refactor.pyi:72:10: UP043 [*] Unnecessary default type arguments
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+ stdlib/pathlib/__init__.pyi:183:80: UP043 [*] Unnecessary default type arguments
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+ stdlib/traceback.pyi:240:90: UP043 [*] Unnecessary default type arguments
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+ stdlib/xml/etree/ElementPath.pyi:11:72: UP043 [*] Unnecessary default type arguments
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+ stdlib/xml/etree/ElementTree.pyi:113:80: UP043 [*] Unnecessary default type arguments
+ stdlib/xml/etree/ElementTree.pyi:114:27: UP043 [*] Unnecessary default type arguments
+ stdlib/xml/etree/ElementTree.pyi:161:47: UP043 [*] Unnecessary default type arguments
+ stdlib/xml/etree/ElementTree.pyi:171:80: UP043 [*] Unnecessary default type arguments
+ stubs/JACK-Client/jack/__init__.pyi:240:39: UP043 [*] Unnecessary default type arguments
+ stubs/PyScreeze/pyscreeze/__init__.pyi:111:6: UP043 [*] Unnecessary default type arguments
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+ stubs/antlr4-python3-runtime/antlr4/ParserRuleContext.pyi:32:46: UP043 [*] Unnecessary default type arguments
+ stubs/antlr4-python3-runtime/antlr4/RuleContext.pyi:26:30: UP043 [*] Unnecessary default type arguments
+ stubs/assertpy/assertpy/assertpy.pyi:64:26: UP043 [*] Unnecessary default type arguments
... 213 additional changes omitted for project

Changes by rule (1 rules affected)

code	total	+ violation	- violation	+ fix	- fix
UP043	265	265	0	0	0

Formatter (stable)

✅ ecosystem check detected no format changes.

Formatter (preview)

✅ ecosystem check detected no format changes.