This is motivated by the latest changes to the preprocessor
which outputs a lot of line directives when code is
generated or unrolled.
In this case the reported line would be correct but not
correctly displayed.
Moreover the system of outputing hashes inside the
`#line` directive proved to be incompatible with some
compilers and tools (renderdoc).
This commit always comments the line directives before
compilation (solves the compatibility issue).
When error logging, we then scan the commented
directives to output the correct filename and source
line. The log line is kept untouched and will show
the correct final generated code that triggered the
error.
This also fixed the error line parsing for vulkan.
Pull Request: https://projects.blender.org/blender/blender/pulls/145096
1f2c906e2a