Copilot setup improvements: Add pack install per language #60

Job	Run time
Compile and Test CodeQL Packs (common)	9m 12s
Compile and Test CodeQL Packs (cpp)	1m 9s
Compile and Test CodeQL Packs (ruby)	1m 47s
Compile and Test CodeQL Packs (javascript)	1m 17s
Compile and Test CodeQL Packs (java)	1m 25s
Compile and Test CodeQL Packs (python)	1m 30s
Compile and Test CodeQL Packs (go)	1m 7s
Compile and Test CodeQL Packs (csharp)	1m 48s
Validate test results	5s
	19m 20s

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