chore: Update to tower 0.5 #3293

Job	Run time
codegen	30s
rustfmt	10s
check (ubuntu-latest)	1m 40s
check-external-types	48s
check (macOS-latest)	1m 33s
cargo-deny check	19s
clippy	1m 7s
check (windows-latest)	4m 2s
Interop Tests (ubuntu-latest)	1m 2s
Check MSRV	55s
Interop Tests (macOS-latest)	51s
semver	53s
test (ubuntu-latest)	2m 54s
Interop Tests (windows-latest)	3m 16s
test (macOS-latest)	1m 55s
Check unused dependencies	3m 47s
test (windows-latest)	6m 14s
	31m 56s

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