Add reinsert to RawOccupiedEntryMut #532

Job	Run time
miri	1m 59s
rustfmt_clippy	50s
test (ubuntu-latest, x86_64-unknown-linux-gnu, 1.64.0)	7m 17s
test (ubuntu-latest, x86_64-unknown-linux-gnu, nightly)	5m 32s
test (ubuntu-latest, i686-unknown-linux-gnu, 1.64.0)	6m 14s
test (ubuntu-latest, i686-unknown-linux-gnu, nightly)	4m 18s
test (ubuntu-latest, i586-unknown-linux-gnu, 1.64.0)	6m 11s
test (ubuntu-latest, i586-unknown-linux-gnu, nightly)	4m 46s
test (ubuntu-latest, armv7-unknown-linux-gnueabihf, 1.64.0)	7m 9s
test (ubuntu-latest, armv7-unknown-linux-gnueabihf, nightly)	7m 12s
test (ubuntu-latest, aarch64-unknown-linux-gnu, 1.64.0)	6m 51s
test (ubuntu-latest, aarch64-unknown-linux-gnu, nightly)	5m 17s
test (ubuntu-latest, thumbv6m-none-eabi, 1.64.0)	3m 59s
test (ubuntu-latest, thumbv6m-none-eabi, nightly)	1m 50s
test (ubuntu-latest, x86_64-pc-windows-gnu, 1.64.0)	6m 13s
test (ubuntu-latest, x86_64-pc-windows-gnu, nightly)	7m 0s
test (macos-latest, x86_64-apple-darwin, nightly)	10m 3s
test (windows-latest, x86_64-pc-windows-msvc, nightly)	12m 26s
test (macos-latest, x86_64-apple-darwin, 1.64.0)	11m 3s
test (windows-latest, x86_64-pc-windows-msvc, 1.64.0)	10m 24s
test (ubuntu-latest, x86_64-unknown-linux-gnu, beta)	4m 9s
test (ubuntu-latest, x86_64-unknown-linux-gnu, stable)	4m 57s
bors build finished	0s
bors build finished	0s
	2h 15m 40s

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