dsl: Add PETSc functionality

[ZoeLeibowitz]

Work in progress PETSc functionality

TODO:

• [ ] Add parallel tests
• [ ] Fix CI-gpu

[codecov[bot]]

Codecov Report

:x: Patch coverage is 33.97171% with 2241 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 75.98%. Comparing base (379c77d) to head (9451510).

Files with missing lines	Patch %	Lines
tests/test_petsc.py	15.30%	974 Missing :warning:
devito/petsc/iet/callbacks.py	16.55%	373 Missing :warning:
devito/petsc/types/metadata.py	37.27%	212 Missing :warning:
devito/petsc/iet/builder.py	14.28%	102 Missing :warning:
devito/petsc/iet/passes.py	35.91%	88 Missing and 3 partials :warning:
devito/petsc/iet/type_builder.py	22.35%	66 Missing :warning:
devito/petsc/logging.py	36.27%	65 Missing :warning:
devito/petsc/types/array.py	56.34%	55 Missing :warning:
devito/petsc/iet/solve.py	24.24%	50 Missing :warning:
devito/petsc/iet/time_dependence.py	34.66%	49 Missing :warning:
... and 22 more

:exclamation: There is a different number of reports uploaded between BASE (379c77d) and HEAD (9451510). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (379c77d)	HEAD (9451510)
pytest-gpu-aomp-amdgpuX	1	0
pytest-gpu-nvc-nvidiaX	1	0

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2570      +/-   ##
==========================================
- Coverage   83.03%   75.98%   -7.05%     
==========================================
  Files         248      273      +25     
  Lines       50499    53844    +3345     
  Branches     4440     4551     +111     
==========================================
- Hits        41930    40913    -1017     
- Misses       7807    12106    +4299     
- Partials      762      825      +63     

Flag	Coverage Δ
pytest-gpu-aomp-amdgpuX	?
pytest-gpu-nvc-nvidiaX	?

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