Fix warnings from PGI and clang compiler

Added MatGetColumnReductions(). MatGetColumnNorms() is now a wrapper that calls MatGetColumnReductions().

Made changes requested by Richard.

Merge branch 'jose/spelling-errors' into 'main'

Fix many spelling errors in manpages and comments

See merge request petsc/petsc!4283

Add MatGetColumnNorms_SeqBAIJ()

Fix spelling errors in manpages and comments

requires: define -> requires: defined

Merge remote-tracking branch 'origin/release'

Mat test ex192: remove 32bit requirement for PARDISO tests

Fix subroutine name in fortran interface

hotfix: missed src/mat/tests/output/ex246_1.out -> src/mat/tests/output/ex249_1.out

hotfix: rename src/mat/tests/ex246.c to ex249.c as ex246.cxx already exists (in main)

Merge remote-tracking branch 'origin/release'

Merge branch 'jczhang/fix-MatCreateSubMatrices-bug' into 'release'

Mat: fix a bug when they are multiple dummy matrices in MatCreateSubMatrices

See merge request petsc/petsc!4229

Merge remote-tracking branch 'origin/release'

VECKOK: when device and host are the same, must return PETSC_MEMTYPE_HOST in VecGetArrayAndMemType

Mat: add a MatCreateSubMatrices test

Unify XXGetYYContext calls

always use void*

MATAIJ: add MatSeqAIJKron(Mat,Mat,MatReuse,Mat*)

MATHTOOL: update commit and MatView

Merge remote-tracking branch 'origin/release'

Some missing CHKERR[Q|MPI]

MATNEST: missing inplace conversion to MATAIJ

Merge remote-tracking branch 'origin/release'

MATAIJCUSPARSE: dispatch to CPU if requested

fix CPU codepath for device matrices
fix MPI ptap
Add tests

Merge remote-tracking branch 'origin/release'