Cleanup/simplicationg of rules.doc/makefile for building of "classic" docs

Commit-type: documentation

Remove need for seperate lib/petsc/conf/test file by merging with rules file

Commit-type: maintainability

introduce seperate rules.doc for the rules for building the "classic" docs

Commit-type: documentation

generated makefiles in ftn-auto do not need to include variables or rules

Commit-type: housekeeping

Only makefiles in the test and tutorial directories need lib/petsc/conf/test

Commit-type: housekeeping

Listing of manual pages for each topical area have three columns but there was no room for all three

Third column was mostly covered by the left sidebar

So remove the left sidebar for these pages

Listing of manual pages for each topical area have three columns but there was no room for all three

Third column was mostly covered by the left sidebar

So remove the left sidebar for these pages

Also make the alphebetical list in three columns, instead of one long list

Do not print "No deprecated routines"

Make all manual pages say :orphan: at the top so they do not need to be in the toc

Commit-type: documentation

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Config: separate SYCLC_LINKER_FLAGS

Driven by the need of moving -Xsycl-target-backend to link time to avoid icpx warnings

Merge branch 'balay/remove-old-nightlybuild-scripts' into 'main'

CI: remove old nightlybuild scripts

See merge request petsc/petsc!6212

CI: remove old nightlybuild scripts

Do not save the hundreds of makefile.html for the website. They are now largely empty and provide no useful information

Just waste disk space

Commit-type: housekeeping

Remove dead unused makefile rule

Commit-type: housekeeping

Fortran stub directories no longer need to list SOURCEC

Commit-type: housekeeping
Reported-by: Jose Roman

Remove unneeded SOURCEH from makefiles

No longer used by docs or build

SNESNEWTONTR: add dogleg and Cauchy fallbacks from NTRDC

CI: add make 'CUDAFLAGS=--compiler-options -Wall,-Wunused-parameter,-Wno-deprecated-declarations,-Werror' to arch-ci-linux-cuda-double-64idx

Merge remote-tracking branch 'origin/release'

Merge branch 'jacobf/2023-03-11/gcov-report-use-bzip2' into 'main'

GCOV Compress With bzip2

See merge request petsc/petsc!6172

Merge branch 'jose/manpages-html-ext' into 'main'

Manual pages: do not show html extension in the list of examples

See merge request petsc/petsc!6182

Merge branch 'jczhang/add-mpiexec-tail' into 'main'

Add --with-mpiexec-tail to add arguments right before user's executable

See merge request petsc/petsc!6167

Use bzip2 to compress the json reports, instead of gzip. Results in a roughly 2x space improvement