move LibrariesLoader under arduino/builder #3067

Job	Run time
run-determination	3s
package-name-prefix	2s
Create artifact Windows_X86-32	1m 46s
Create artifact Windows_X86-64	2m 0s
Create artifact Linux_X86-32	2m 0s
Create artifact Linux_X86-64	1m 42s
Create artifact Linux_ARMv6	1m 53s
Create artifact Linux_ARMv7	1m 37s
Create artifact Linux_ARM64	1m 46s
Create artifact macOS_64	2m 13s
Create artifact macOS_ARM64	2m 32s
Create artifact rpc-protocol-files	14s
Create artifact configuration-schema	23s
checksums	9s
	18m 20s

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