Use Self backport in BinaryPath factory method. (pantsbuild#18763)

src/python/pants/backend/python/util_rules/pex_environment.py

@@ -92,7 +92,7 @@ def verbosity(self) -> int:
 
 
 @dataclass(frozen=True)
-class PythonExecutable(BinaryPath["PythonExecutable"], EngineAwareReturnType):
+class PythonExecutable(BinaryPath, EngineAwareReturnType):
     """The BinaryPath of a Python executable for user code, along with some extras."""
 
     append_only_caches: FrozenDict[str, str] = FrozenDict({})

src/python/pants/core/util_rules/system_binaries.py

@@ -11,7 +11,9 @@
 from dataclasses import dataclass
 from enum import Enum
 from textwrap import dedent  # noqa: PNT20
-from typing import Generic, Iterable, Mapping, Sequence, TypeVar
+from typing import Iterable, Mapping, Sequence
+
+from typing_extensions import Self
 
 from pants.base.deprecated import warn_or_error
 from pants.core.subsystems import python_bootstrap
@@ -40,11 +42,8 @@
 SEARCH_PATHS = ("/usr/bin", "/bin", "/usr/local/bin", "/opt/homebrew/bin")
 
 
-BinaryPathT = TypeVar("BinaryPathT", bound="BinaryPath")
-
-
 @dataclass(frozen=True)
-class BinaryPath(Generic[BinaryPathT]):
+class BinaryPath:
     path: str
     fingerprint: str
 
@@ -61,8 +60,8 @@ def _fingerprint(content: bytes | bytearray | memoryview | None = None) -> str:
 
     @classmethod
     def fingerprinted(
-        cls: type[BinaryPathT], path: str, representative_content: bytes | bytearray | memoryview
-    ) -> BinaryPathT:
+        cls, path: str, representative_content: bytes | bytearray | memoryview
+    ) -> Self:
         return cls(path, fingerprint=cls._fingerprint(representative_content))