Fix msrv: Run msrv checks with minimal versions #4634

Job	Run time
test	22m 21s
cargo-deny (advisories)	26s
installation (win-msvc)	6m 6s
cargo-deny (bans licenses sources)	24s
installation (win-gnu)	8m 27s
check-packetline (ubuntu-latest)	7s
installation (win32-msvc)	6m 33s
lint	3m 37s
installation (win32-gnu)	6m 34s
test-32bit (armv7-linux-androideabi)	1m 11s
test-fast (windows-latest)	14m 10s
WebAssembly (wasm32-unknown-unknown)	1m 3s
test-fast (macos-latest)	3m 15s
WebAssembly (wasm32-wasi)	49s
test-fast (ubuntu-latest)	3m 31s
pure-rust-build	2m 4s
	1h 20m 38s

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