[DirectX] Implement Shader Flags Analysis for WaveOps

[bharadwajy]

Set function-level flag WaveOps flag if the function uses DXIL Wave Operations - see here

This flag is named m_bWaveOps in dxc sources.

AC:

Add tests to verify the flag is set.

[inbelic]

I will take a look at this as a use-case of #115912

[damyanp]

Waiting on #111867