[move] Remove `spec` syntax and ignore new-style specs #80494

Job	Run time
diff	10s
license-check	1m 3s
test (ubuntu-ghcloud)	27m 0s
test-extra (ubuntu-ghcloud)	26m 7s
windows-build (windows-ghcloud)	9m 8s
simtest	15m 45s
clippy	3m 29s
move-test	0s
test	0s
cargo-deny (bans, licenses, sources)	36s
cargo-deny (advisories)	31s
rustfmt	20s
test-extra	0s
cutting a new execution layer	1m 32s
	1h 25m 41s

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