Allow UpdateConfiguration IPC KeyPaths of length zero; Disallow updates to component accessControl #2962

Job	Run time
Check formatting	1m 41s
Check git-secrets	1m 30s
Check build with GCC	59s
Check build with Clang	1m 8s
Check cross-build for arm32 Musl	59s
Check clang-tidy	1m 32s
Check header includes	1m 29s
Check editorconfig	33s
Check spelling	39s
Check cmake-lint	38s
Check shellcheck	37s
	11m 45s

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