chore: Update to tower 0.5 #3391

Job	Run time
cargo-deny check	19s
rustfmt	6s
clippy	56s
codegen	23s
check (ubuntu-latest)	2m 10s
Interop Tests (ubuntu-latest)	45s
check (macOS-latest)	2m 33s
Interop Tests (macOS-latest)	1m 0s
check (windows-latest)	5m 2s
semver	43s
Interop Tests (windows-latest)	3m 36s
Check MSRV	48s
Check unused dependencies	3m 35s
test (ubuntu-latest)	3m 4s
check-external-types	33s
test (macOS-latest)	2m 2s
test (windows-latest)	4m 58s
	32m 33s

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