Delete old objects when calling `ObjectStore::put` #4580

Job	Run time
check format (ubuntu-latest / nightly)	15s
check docs (ubuntu-latest / stable)	23s
test (ubuntu-latest / stable)	7m 15s
check linter (ubuntu-latest / stable)	47s
check examples (ubuntu-latest / stable)	38s
test (macos-latest / stable)	6m 15s
check feature flags (ubuntu-latest / stable)	15m 43s
test (windows-latest / stable)	11m 38s
check licenses (ubuntu-latest / stable)	38s
check minimal versions of transitive dependencies (ubuntu-latest / stable)	27s
check minimal supported rust version (ubuntu-latest / msrv)	17s
check spelling (ubuntu-latest / nightly)	23s
	44m 39s

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