feat: add null input handling options for `any_value` #1689

Job	Run time
Dry-run release	20s
Check Protobuf	11s
Check proto-prefix.py	10s
Check editorconfig	3s
Check Protobuf Style	9s
Style-check and lint Python files	9s
Build Website	45s
Lint YAML extensions	3s
Validate YAML extensions	5s
	1m 55s

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