[proj, proj4] Update to PROJ 9.0.0 & make proj the regular port

[dg0yt]

• What does your PR fix?

  Updates to PROJ 9.0.0.
  Makes proj the regular port instead of proj4.
  Moves cmake config to lower-case folders, and data into a subfolder.

• Which triplets are supported/not supported? Have you updated the CI baseline?

  all, no

• Does your PR follow the maintainer guide?

  yes

• If you have added/updated a port: Have you run ./vcpkg x-add-version --all and committed the result?

  yes

[github-actions]

You have modified or added at least one vcpkg.json where a "license" field is missing.

If you feel able to do so, please consider adding a "license" field to the following files:

• ports/libgeotiff/vcpkg.json
• ports/libosmium/vcpkg.json
• ports/libspatialite/vcpkg.json
• ports/vtk/vcpkg.json

Valid values for the license field can be found in the documentation

[JackBoosY]

Also please resolve this PR's conflicts.

Thanks.

[dg0yt]

I will resolve the conflicts with the official release which we can expect today.
Independent of that, you may validate the switch of regular and stub port which comes with this PR.

[rhuijben]

There are some most likely unrelated 7zip errors on x64_uwp and arm64 builds now?

[dg0yt]

There are some most likely unrelated 7zip errors on x64_uwp and arm64 builds now?

Entirely unrelated: #23284

[vicroms]

Suggested change

	"version-semver": "8.9.9",
	"version": "8.9.9",

[rhuijben]

Can you explain why?
I would expect server to have stricter rules than plain version, so to be slightly better.

[vicroms]

We prefer relaxed version unless upstream explicitly states that they follow semver strictly.
I admit, it doesn't matter much here since we don't expect to keep updating the proj4 port.

[dg0yt]

This is intentional.
AFAIU we need to keep the version scheme to have an upgrade path with a version number which compares greater-than to the previous version.

[vicroms]

I see, a while ago we made changes to how we treat version and version-semver during version resolution so it shouldn't matter anymore. We need to update our docs to catch-up with current implementation.

[JackBoosY]

Can you please resolve the file conflicts?

Thanks.

[dg0yt]

Can this be merged soon? New releases for libgeotiff and gdal are coming, and I'm tired of merge conflicts from versioning meta data.

[JackBoosY]

Ping @vicroms @BillyONeal for merge this quickly.