TST: Skip flaky offset test case on WASM (pandas-dev#60186)

* TST: Skip flaky offset test case on WASM

* Check tzinfo exists

* Check for zoneinfo directly

* Undo original change

* Try installing tzdata to fix

* Revert "Try installing tzdata to fix"

This reverts commit 6698cd5.

* Revert "Undo original change"

This reverts commit 5bc7272.

pandas/tests/tseries/offsets/test_offsets_properties.py

@@ -8,12 +8,16 @@
 tests, or when trying to pin down the bugs exposed by the tests below.
 """
 
+import zoneinfo
+
 from hypothesis import (
     assume,
     given,
 )
 import pytest
 
+from pandas.compat import WASM
+
 import pandas as pd
 from pandas._testing._hypothesis import (
     DATETIME_JAN_1_1900_OPTIONAL_TZ,
@@ -28,6 +32,15 @@
 @given(DATETIME_JAN_1_1900_OPTIONAL_TZ, YQM_OFFSET)
 def test_on_offset_implementations(dt, offset):
     assume(not offset.normalize)
+    # This case is flaky in CI 2024-11-04
+    assume(
+        not (
+            WASM
+            and isinstance(dt.tzinfo, zoneinfo.ZoneInfo)
+            and dt.tzinfo.key == "Indian/Cocos"
+            and isinstance(offset, pd.offsets.MonthBegin)
+        )
+    )
     # check that the class-specific implementations of is_on_offset match
     # the general case definition:
     #   (dt + offset) - offset == dt