Improved compile speed by running multi-threaded library discovery. #5236

Job	Run time
run-determination	1s
package-name-prefix	1s
Create artifact Windows_X86-32	1m 6s
Create artifact Windows_X86-64	1m 6s
Create artifact Linux_X86-32	1m 6s
Create artifact Linux_X86-64	1m 5s
Create artifact Linux_ARMv6	1m 2s
Create artifact Linux_ARMv7	55s
Create artifact Linux_ARM64	57s
Create artifact macOS_64	1m 29s
Create artifact macOS_ARM64	1m 50s
Create artifact rpc-protocol-files	13s
Create artifact configuration-schema	17s
checksums	4s
	11m 12s

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