Add pyfarmhash stubs (#5139)

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>

stubs/pyfarmhash/METADATA.toml

@@ -0,0 +1 @@
+version = "0.2"

stubs/pyfarmhash/farmhash.pyi

@@ -0,0 +1,9 @@
+def fingerprint128(__a: str) -> tuple[int, int]: ...
+def fingerprint32(__a: str) -> int: ...
+def fingerprint64(__a: str) -> int: ...
+def hash128(__a: str) -> tuple[int, int]: ...
+def hash128withseed(__a: str, __seed_low: int, __seed_high: int) -> tuple[int, int]: ...
+def hash32(__a: str) -> int: ...
+def hash32withseed(__a: str, __seed: int) -> int: ...
+def hash64(__a: str) -> int: ...
+def hash64withseed(__a: str, __seed: int) -> int: ...