Improved compile speed by running multi-threaded library discovery. #5681

Job	Run time
run-determination	3s
package-name-prefix	2s
Create artifact Linux_X86-32	1m 5s
Create artifact Windows_X86-32	45s
Create artifact Linux_ARMv6	57s
Create artifact macOS_ARM64	2m 32s
Create artifact configuration-schema	19s
Create artifact Windows_X86-64	44s
Create artifact rpc-protocol-files	17s
Create artifact Linux_ARMv7	1m 0s
Create artifact Linux_X86-64	56s
Create artifact Linux_ARM64	1m 2s
Create artifact macOS_64	1m 36s
checksums	9s
	11m 27s

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