[PerModuleStyleManagement] Increase in Module load time.

Increase in Module Load time when PerModuleStyles is turned on.

I added performance test which run with and without isolate-styles=false

The test loads two modules, one with MX component, and another with spark components

With Per Module Styles
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Time to load Module With MX Components: 6.9 seconds
Time to load Module With Spark Components: 6.4 seconds

Without Per Module Styles
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Time to load Module With MX Components: 5.3 seconds
Time to load Module With Spark Components: 4.8 seconds