Setting the frame's line number causes `SystemError` to be raised if done in callback from `BRANCH_LEFT` or `BRANCH_RIGHT` event

[markshannon]

Bug report

Bug description:

https://github.com/python/cpython/blob/main/Objects/frameobject.c#L1711

The two two new events BRANCH_LEFT and BRANCH_RIGHT should be added under case PY_MONITORING_EVENT_BRANCH:

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-137200: support frame lineno setter with BRANCH_LEFT and BRANCH_RIGHT events #137229
• [3.14] gh-137200: support frame lineno setter with BRANCH_LEFT and BRANCH_RIGHT events (GH-137229) #137280