[flake8-bugbear] Treat return as equivalent to break (B909)

[charliermarsh]

Closes #12640.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

ℹ️ ecosystem check detected linter changes. (+2 -1 violations, +0 -0 fixes in 2 projects; 52 projects unchanged)

rotki/rotki (+2 -0 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --ignore RUF9 --output-format concise --preview

+ rotkehlchen/api/rest.py:526:130: RUF100 [*] Unused `noqa` directive (unused: `B909`)
+ rotkehlchen/chain/evm/decoding/decoder.py:926:44: RUF100 [*] Unused `noqa` directive (unused: `B909`)

pytest-dev/pytest (+0 -1 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --ignore RUF9 --output-format concise --preview

- src/_pytest/pytester.py:310:17: B909 Mutation to loop iterable `self.calls` during iteration

Changes by rule (2 rules affected)

code	total	+ violation	- violation	+ fix	- fix
RUF100	2	2	0	0	0
B909	1	0	1	0	0