(transform): csl-stencil to csl-wrapper pass

[n-io]

Pass to lower csl_stencil to csl_wrapper.

• Creates one csl_wrapper.module for each module-level function
• Extracts stencil-related params to initialise csl_wrapper.modue and both of its layout_module and program_module regions
• Initialises layout_module with everything required for running stencil programs and yields it to program_module, specifically: memcpy params, routes config, and isBorderRegionPE bool

Not in this PR:

• Handling host-device transferable symbols and setting up exports
• Setting up and exporting program entry point

As such, the translated func is currently simply placed inside the program_module.

Update:

• Host-device transferable symbols are now added to the program_module block args
• The function op is resolved
• The function sym_name is stored as a property on the module
• The function body is moved into the program module body
• We set up a main entry point csl.func named after the translated func.func, transfer the ops into the new csl main func, and add the function to the program module body

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.91%. Comparing base (9f4a53b) to head (c4a4a93).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2878      +/-   ##
==========================================
+ Coverage   89.85%   89.91%   +0.05%     
==========================================
  Files         399      400       +1     
  Lines       50171    50312     +141     
  Branches     7755     7776      +21     
==========================================
+ Hits        45083    45237     +154     
+ Misses       3860     3847      -13     
  Partials     1228     1228              

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[AntonLydike]

Nice stuff! Would always love more comments, but the code is already quite a bit more readable than before!