256df54575
* [ATOM-15276] Shader Build Pipeline: Add Shader Supervariant System. Added ShaderAssetBuilder2 & ShaderVariantAssetBuilder2. Added ShaderAsset2, ShaderVariantAsset2. Eventually they will be the only builders. AzslBuilder & SrgLayoutBuilder will be removed. ShaderResourceGroupAsset will be removed. ShaderAssetBuilder & ShaderVariantAssetBuilder will be replaced. Signed-off-by: garrieta <garrieta@amazon.com>