Adds documentation to the GPU dialect docs giving a general overview of the new
compilation mechanism introduced in the patch series ending in D154153.
Reviewed By: mehdi_amini
Differential Revision: https://reviews.llvm.org/D157461
Summary:
This revision performs a lot of different cleanups on operation documentation to ensure that they are consistent, e.g. using mlir code blocks, formatting, etc.
This revision also includes the auto-generated documentation into the hand-written documentation for the dialects that have a specific top-level dialect file. This updates the documentation for all dialects aside from SPIRV and STD. These dialects will be updated in a followup.
Differential Revision: https://reviews.llvm.org/D76734
