[PATCH 40/79] [Backport to 15][DebugInfo] Support translation of DebugEntryPoint...

[PATCH 40/79] [Backport to 15][DebugInfo] Support translation of DebugEntryPoint instruction (#1973)

This instruction is generated for DWARF `DISPFlagMainSubprogram` flag of
function as well as for `spir_kernel` functions.

Spec:
https://github.com/KhronosGroup/SPIRV-Registry/blob/main/nonsemantic/NonSemantic.Shader.DebugInfo.100.asciidoc#DebugEntryPoint

Gbp-Pq: Name 0040-Backport-to-15-DebugInfo-Support-translation-of-Debu.patch