Add metadata and headers to Object Store #4500

Job	Run time
check format (ubuntu-latest / nightly)	13s
check docs (ubuntu-latest / stable)	1m 11s
check examples (ubuntu-latest / stable)	54s
check feature flags (ubuntu-latest / stable)	16m 20s
check licenses (ubuntu-latest / stable)	29s
check linter (ubuntu-latest / stable)	1m 41s
check minimal versions of transitive dependencies (ubuntu-latest / stable)	32s
check minimal supported rust version (ubuntu-latest / msrv)	36s
check spelling (ubuntu-latest / nightly)	6m 2s
test (ubuntu-latest / stable)	8m 34s
test (macos-latest / stable)	9m 4s
test (windows-latest / stable)	12m 21s
	57m 57s

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