Engine no longer compiles after backporting RHI thread improvements and crash fix

Unreal Engine 5.4 code will no longer compile after applying both the RHI improvement code changes as described in [Link Removed] and the fix for the crash described in [Link Removed]. The compilation errors show missing identifiers (such as GRHISupportsShaderBundleParallel) and altered function signatures, which might indicate missing code changes from commits prior to the crash fix.

• Starting from a vanilla 5.4 code base, implement the patch to enable RHI thread improvements from [Link Removed] (this should compile without errors)
• Apply the fix for the crash in version 5.4 when integrating the RHI thread improvement zip, as mentioned in [Link Removed]
• There will be compilation errors due to missing code changes from previous commits