Remove "upload HEAD coverage" workflow #4679

Job	Run time
Block fixup commits	14s
Filter changes	2s
Check whether Cargo.lock is up to date	25s
Shellcheck	9s
Spell Check with Typos	5s
Sort dependencies	2m 12s
Run cargo fmt	14s
Run cargo audit	14s
Run cargo clippy	1m 39s
Run cargo check on MSRV	1m 42s
Run cargo test	9m 17s
nightly / doc	1m 32s
Check for unused dependencies	6m 54s
Check markdown	0s
	24m 39s

Provide feedback