Move stdlib allowlists to stdlib/@tests (#11982)

Rename py3_common.txt to common.txt

.gitattributes

@@ -3,7 +3,7 @@
 * eol=lf
 # Set linguist-language to support comments syntax highlight
 **/stubtest_allowlist*.txt linguist-language=ini
-tests/stubtest_allowlists/*.txt linguist-language=ini
+**/stubtest_allowlists/*.txt linguist-language=ini
 tests/pytype_exclude_list.txt linguist-language=ini
 pyrightconfig*.json linguist-language=jsonc
 .vscode/*.json linguist-language=jsonc

.gitignore

@@ -73,4 +73,4 @@ analyze.py
 .python-version
 
 # deliberately local test configuration files
-tests/stubtest_allowlists/*.local
+stdlib/@tests/stubtest_allowlists/*.local

tests/README.md

@@ -137,7 +137,7 @@ on your typeshed fork).
 As a convenience, stubtest\_stdlib.py will look for local-only allowlist files
 and use those if they are present. Only version-specific local allowlists are supported.
 An example local allowlist file is
-`tests/stubtest_allowlists/py312.txt.local`. Use caution when taking advantage of this feature;
+`stdlib/@tests/stubtest_allowlists/py312.txt.local`. Use caution when taking advantage of this feature;
 the CI run of stubtest remains canonical.
 
 If you need a specific version of Python to repro a CI failure,
@@ -145,7 +145,7 @@ If you need a specific version of Python to repro a CI failure,
 
 Due to its dynamic nature, you may run into false positives. In this case, you
 can add to the allowlists for each affected Python version in
-`tests/stubtest_allowlists`. Please file issues for stubtest false positives
+`stdlib/@tests/stubtest_allowlists`. Please file issues for stubtest false positives
 at [mypy](https://github.com/python/mypy/issues).
 
 ## stubtest\_third\_party.py

tests/utils.py

@@ -163,14 +163,14 @@ def get_all_testcase_directories() -> list[DistributionTests]:
 
 def allowlists_path(distribution_name: str) -> Path:
     if distribution_name == "stdlib":
-        return Path("tests", "stubtest_allowlists")
+        return tests_path("stdlib") / "stubtest_allowlists"
     else:
         return tests_path(distribution_name)
 
 
 def common_allowlists(distribution_name: str) -> list[str]:
     if distribution_name == "stdlib":
-        return ["py3_common.txt", f"{sys.platform}.txt"]
+        return ["common.txt", f"{sys.platform}.txt"]
     else:
         return ["stubtest_allowlist.txt", f"stubtest_allowlist_{sys.platform}.txt"]