Add MockVariablePolicyHelperLib #3635

Job	Run time
Gather Repo Packages	5s
Analyze (CryptoPkg)	9m 46s
Analyze (MdeModulePkg)	21m 20s
Analyze (MdePkg)	11m 40s
Analyze (NetworkPkg)	12m 48s
Analyze (PcAtChipsetPkg)	8m 9s
Analyze (PolicyServicePkg)	8m 7s
Analyze (ShellPkg)	11m 35s
Analyze (StandaloneMmPkg)	5m 37s
Analyze (UefiCpuPkg)	9m 43s
Analyze (UnitTestFrameworkPkg)	7m 38s
	1h 46m 28s

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