Validate user config keybindings #6909

Job	Run time
check-codebase	27s
Integration Tests - git 2.20.0	1m 21s
Integration Tests - git 2.22.5	1m 13s
ci - ubuntu-latest	50s
Integration Tests - git 2.23.0	1m 20s
ci - windows-latest	2m 18s
Integration Tests - git 2.25.1	1m 28s
Integration Tests - git 2.30.8	1m 17s
build	1m 14s
Integration Tests - git latest	1m 23s
check-for-fixups	5s
check-required-label	2s
lint	33s
upload-coverage	28s
	13m 59s

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