meta: add support for alpha prerelease tag #6405

Job	Run time
Build slim tarball	3m 2s
aarch64-linux: Cache V8 build	21m 59s
aarch64-darwin: with shared libraries	21m 55s
x86_64-darwin: with shared libraries	22m 5s
x86_64-linux: with shared libraries	21m 42s
aarch64-linux: with shared ${{ matrix.openssl.name }}	1s
	1h 30m 44s

Provide feedback