- Fix shebang of pgadmin4-desktop to use python3.11

- New pgadmin4-cloud subpackage that includes now the cloud
dependencies and make the pgadmin4-cloud package optional so
it's now optional to depend on the azure/aws/google python
packages.
- Add patch to let pgadmin4 work without cloud support:
* make-cloud-packages-optional.patch

- Add a optipng script that actually uses pngcrush to compress png
images so we don't depend on optipng which is not available in
SLE.
- Fix pgadmin4-desktop to use a timer instead of threads. It seems
there's an issue the way python threads were used with Qt5 that
made the script fail to update the systray menu when pgadmin was
started.
- Add missing python-typer dependency
- Add pgadmin4-user.conf file to create the pgadmin user/group
using systemd with the new system-user-pgadmin package.

- Replace yarn (which is not available in SLE) with
local-npm-registry.
- Add node_modules service and node_modules.obscpio /
node_modules.spec.inc source files which replace vendor.tar.xz
that is now removed.
- package_deps.patch - dependency fixes
- package_git_local.patch - dependency fixes that are needed *after*
generating package-lock.json since only registry-supplied packages
are available locally.
- Update update-vendor.sh script.