Optimize MatSetPreallocationCOO_SeqAIJ when MatHypre gives already sorted coordinates

Mat: GetAbsSum (l1) row norms; PCJacobi: add scaled L1 diagonal approximation

Leverage the new structure of MATNORMAL when calling SuiteSparseQR

Remove unused Fortran kernels

Merge remote-tracking branch 'origin/release'

Use < instead of " for includes of PETSc include files

And Remove unneeded duplicate includes

Co-Authored-by: Jose Roman <jroman@dsic.upv.es>

Fix bad calls to PetscObjectComposeFunction

Seemingly due to copy-paste errors

Sys: add PetscSafePointerPlusOffset() to pacify UBSan

First batch of fixes

LIBBASE is no longer used in make so remove it

Vec: add GEMV optimizations for VecMDot and friends for VecKokkos

Merge remote-tracking branch 'origin/release'

Update references in the manual pages to use Sphinx citation processing

Mat: sync the host array in MatShift_SeqAIJ() because the routine is shared by device subclasses

Mat: set up the diag in MatSetSeqAIJWithArrays_private

As we want this info to be always ready for use

fixes #1490

Merge remote-tracking branch 'origin/release'

Fix potential integer overflow in MatSeqAIJSetPreallocation().

Reported-by: Miguel Angel Salazar de Troya <miguel.salazar@corintis.com>

Merge remote-tracking branch 'origin/release'

Docs: fix wrong occurences of then instead of than

Merge remote-tracking branch 'origin/release'