runtime(debian): update debian related runtime files (#13423)

* Update Debian runtime files

Add mantic as a supported Ubuntu release and move buster/kinetic to
unsupported.

Add syntax highlighting for deb822sources filetype.

Add debsources ftplugin to set relevant comment options.

Move common version information to shared/debversions.vim

Closes #11934

Co-authored-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Co-authored-by: James Addison <jay@jp-hosting.net>
Co-authored-by: Viktor Szépe <viktor@szepe.net>
Signed-off-by: James McCoy <jamessan@jamessan.com>

* Add myself as codeowner for Debian-related runtime files

Signed-off-by: James McCoy <jamessan@jamessan.com>

---------

Signed-off-by: James McCoy <jamessan@jamessan.com>
Co-authored-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Co-authored-by: James Addison <jay@jp-hosting.net>
Co-authored-by: Viktor Szépe <viktor@szepe.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/shared/debversions.vim b/runtime/syntax/shared/debversions.vim
new file mode 100644
index 0000000..e96b558
--- /dev/null
+++ b/runtime/syntax/shared/debversions.vim
@@ -0,0 +1,29 @@
+" Vim syntax file
+" Language:     Debian version information
+" Maintainer:   Debian Vim Maintainers
+" Last Change: 2023 Oct 11
+" URL: https://salsa.debian.org/vim-team/vim-debian/blob/main/syntax/shared/debversions.vim
+
+let s:cpo = &cpo
+set cpo-=C
+
+let g:debSharedSupportedVersions = [
+      \ 'oldstable', 'stable', 'testing', 'unstable', 'experimental', 'sid', 'rc-buggy',
+      \ 'bullseye', 'bookworm', 'trixie', 'forky',
+      \
+      \ 'trusty', 'xenial', 'bionic', 'focal', 'jammy', 'lunar', 'mantic',
+      \ 'devel'
+      \ ]
+let g:debSharedUnsupportedVersions = [
+      \ 'buzz', 'rex', 'bo', 'hamm', 'slink', 'potato',
+      \ 'woody', 'sarge', 'etch', 'lenny', 'squeeze', 'wheezy',
+      \ 'jessie', 'stretch', 'buster',
+      \
+      \ 'warty', 'hoary', 'breezy', 'dapper', 'edgy', 'feisty',
+      \ 'gutsy', 'hardy', 'intrepid', 'jaunty', 'karmic', 'lucid',
+      \ 'maverick', 'natty', 'oneiric', 'precise', 'quantal', 'raring', 'saucy',
+      \ 'utopic', 'vivid', 'wily', 'yakkety', 'zesty', 'artful', 'cosmic',
+      \ 'disco', 'eoan', 'hirsute', 'impish', 'kinetic', 'groovy'
+      \ ]
+
+let &cpo=s:cpo