Delete old objects when calling `ObjectStore::put` #4583

Job	Run time
check format (ubuntu-latest / nightly)	14s
check feature flags (ubuntu-latest / stable)	15m 1s
check docs (ubuntu-latest / stable)	27s
check examples (ubuntu-latest / stable)	33s
check linter (ubuntu-latest / stable)	43s
check minimal supported rust version (ubuntu-latest / msrv)	16s
test (ubuntu-latest / stable)	7m 10s
check licenses (ubuntu-latest / stable)	23s
test (macos-latest / stable)	6m 19s
check minimal versions of transitive dependencies (ubuntu-latest / stable)	29s
test (windows-latest / stable)	9m 14s
check spelling (ubuntu-latest / nightly)	22s
	41m 11s

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