Improved index merger for tool release flavors #1455

Job	Run time
run-determination	1s
package-name-prefix	1s
Create artifact Windows_X86-32	1m 10s
Create artifact Windows_X86-64	1m 10s
Create artifact Linux_X86-32	1m 4s
Create artifact Linux_X86-64	1m 6s
Create artifact Linux_ARMv6	54s
Create artifact Linux_ARMv7	1m 3s
Create artifact Linux_ARM64	57s
Create artifact macOS_64	1m 33s
Create artifact macOS_ARM64	1m 43s
Create artifact rpc-protocol-files	17s
Create artifact configuration-schema	15s
checksums	15s
	11m 29s

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