Performance profiling tool for CI

[CedricGuillemet]

Goal is to do (automatic) performance profiling of BabylonNative to detect any regression. This issue will keep track of tasks and PR to achieve it.

Discussion : #900

• Separate TestUtils into its own plugin testUtils plugin #908
• Extend TestUtils plugin with bgfx stats report
• Generate/compare Resources profile in ValidationTests
• Experiment stats as Chrome profiling frontend
• Experiment profiling markers inside Native code (Xcode and ETW)
• Experiment profiling on CI: how reliable is it? is it HW accelerated, can we get valuable informations ?