Import CPython 3.14.6+ stable branch (2026-06-14)

Summary:
Imported python/cpython `3.14.6+` from upstream rev [`f892d79`](https://www.github.com/python/cpython/commit/f892d79013a1f0eb00a67b902d317ef3f9e5f4d3) (committed 2026-06-14 18:37:28+00:00).

# Commit Info

- Base: (`3.14.6+`) - [`44d1aeb`](https://www.github.com/python/cpython/commit/44d1aebd9f228e34bc7d8d9bc3e145794dc4c6bc) (commit date: 2026-06-14 16:40:51+00:00)
- Imported: (`3.14.6+`) - [`f892d79`](https://www.github.com/python/cpython/commit/f892d79013a1f0eb00a67b902d317ef3f9e5f4d3) (commit date: 2026-06-14 18:37:28+00:00)

Reviewed By: itamaro

Differential Revision: D108603887

fbshipit-source-id: 6b75ab97f628843013096184938c529e6ed658ca

Author: generatedunixname1734921407115435

Lib/test/test_json/test_recursion.py

@@ -68,6 +68,7 @@ def default(self, o):
             self.fail("didn't raise ValueError on default recursion")
 
 
+    @support.skip_if_pgo_task  # fails during PGO training w/ some stack sizes
     @support.skip_if_unlimited_stack_size
     @support.skip_emscripten_stack_overflow()
     @support.skip_wasi_stack_overflow()