Add metadata and headers to Object Store #4501

Job	Run time
check docs (ubuntu-latest / stable)	1m 15s
check feature flags (ubuntu-latest / stable)	15m 46s
check format (ubuntu-latest / nightly)	13s
check examples (ubuntu-latest / stable)	58s
check licenses (ubuntu-latest / stable)	22s
check linter (ubuntu-latest / stable)	1m 35s
check minimal versions of transitive dependencies (ubuntu-latest / stable)	30s
check minimal supported rust version (ubuntu-latest / msrv)	33s
check spelling (ubuntu-latest / nightly)	6m 5s
test (ubuntu-latest / stable)	8m 19s
test (macos-latest / stable)	9m 15s
test (windows-latest / stable)	11m 39s
	56m 30s

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