Support specializing generic entrypoints in `findAndCheckEntryPoint`.… #578

Job	Run time
release (linux, release, x86_64, smoke)	17m 14s
release (linux, release, aarch64, smoke)	32m 4s
release (macos, release, x86_64, smoke)	15m 47s
release (macos, release, aarch64, smoke)	12m 36s
release (windows, release, x86_64, smoke)	20m 3s
release (windows, release, aarch64, smoke)	25m 16s
	2h 3m 0s

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