Lint

Arm backend: Remove stale rshift scalar xfail #78038

Job	Run time
link-check / lint-urls	14s
link-check / lint-xrefs	14s
link-check / lint-file-size	13s
Get changed files / get-changed-files	6s
lintrunner	52s
lintrunner-mypy	3m 24s
	5m 3s

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