Add PartialEq and Eq to Entry and improve entry tests #4401

Job	Run time
check feature flags (ubuntu-latest / stable)	8m 32s
check format (ubuntu-latest / nightly)	12s
check examples (ubuntu-latest / stable)	52s
check licenses (ubuntu-latest / stable)	23s
check docs (ubuntu-latest / stable)	59s
check minimal versions of transitive dependencies (ubuntu-latest / stable)	36s
check linter (ubuntu-latest / stable)	1m 22s
check minimal supported rust version (ubuntu-latest / msrv)	33s
check spelling (ubuntu-latest / nightly)	22s
test (ubuntu-latest / stable)	8m 10s
test (macos-latest / stable)	8m 51s
test (windows-latest / stable)	11m 44s
	42m 36s

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