[refurb] Ignore decorated functions for FURB118

[danparizher]

Summary

Fixes #19305

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

ℹ️ ecosystem check detected linter changes. (+0 -16 violations, +0 -0 fixes in 2 projects; 53 projects unchanged)

apache/airflow (+0 -10 violations, +0 -0 fixes)

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

- airflow-core/tests/unit/decorators/test_mapped.py:34:13: FURB118 Use `operator.add` instead of defining a function
- airflow-core/tests/unit/ti_deps/deps/test_mapped_task_upstream_dep.py:113:13: FURB118 Use `operator.add` instead of defining a function
- airflow-core/tests/unit/ti_deps/deps/test_mapped_task_upstream_dep.py:199:13: FURB118 Use `operator.add` instead of defining a function
- providers/amazon/tests/system/amazon/aws/example_ec2.py:105:5: FURB118 Use `operator.itemgetter(0)` instead of defining a function
- providers/amazon/tests/system/amazon/aws/example_emr.py:128:5: FURB118 Use `operator.itemgetter(0)` instead of defining a function
- providers/amazon/tests/unit/amazon/aws/hooks/test_rds.py:104:5: FURB118 Use `operator.itemgetter("DBClusterSnapshotIdentifier")` instead of defining a function
- providers/amazon/tests/unit/amazon/aws/hooks/test_rds.py:82:5: FURB118 Use `operator.itemgetter("DBSnapshotIdentifier")` instead of defining a function
- providers/amazon/tests/unit/amazon/aws/hooks/test_rds.py:87:5: FURB118 Use `operator.itemgetter("DBSnapshotArn")` instead of defining a function
- providers/standard/tests/unit/standard/decorators/test_python.py:742:9: FURB118 Use `operator.mul` instead of defining a function
- task-sdk/tests/task_sdk/definitions/test_mappedoperator.py:526:9: FURB118 Use `operator.add` instead of defining a function

astropy/astropy (+0 -6 violations, +0 -0 fixes)

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

- astropy/io/fits/hdu/compressed/tests/conftest.py:100:5: FURB118 Use `operator.itemgetter(1)` instead of defining a function
- astropy/io/fits/hdu/compressed/tests/conftest.py:105:5: FURB118 Use `operator.itemgetter(2)` instead of defining a function
- astropy/io/fits/hdu/compressed/tests/conftest.py:95:5: FURB118 Use `operator.itemgetter(0)` instead of defining a function
- astropy/io/fits/hdu/compressed/tests/test_fitsio.py:90:5: FURB118 Use `operator.itemgetter(1)` instead of defining a function
- astropy/io/fits/hdu/compressed/tests/test_fitsio.py:95:5: FURB118 Use `operator.itemgetter(0)` instead of defining a function
- astropy/modeling/tests/test_separable.py:189:9: FURB118 Use `operator.add` instead of defining a function

Changes by rule (1 rules affected)

code	total	+ violation	- violation	+ fix	- fix
FURB118	16	0	16	0	0

[dylwil3]

Excellent, thank you!