Update libpq to version 18.3

[frankhale]

Update libpq to version 18.3. This has been tested on MacOS 26.3.1 and Arm64 Linux

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version, or no changes were necessary.
• Any fixed CI baseline and CI feature baseline entries are removed from that file, or no entries needed to be changed.
• All patch files in the port are applied and succeed.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Exactly one version is added in each modified versions file.

[dg0yt]

Is it necessary to replace the msbuild stuff?

[frankhale]

Is it necessary to replace the msbuild stuff?

it was replaced because PG18 uses Meson

[dg0yt]

A PR can add only one new version entry for a port. Here, it is libpq 18.3 port-version 0.

After applying the suggestions to the ports/libpq diretroy, the git-tree referenence will change. Run this command to update the entry which is already part of the PR:

vcpkg x-add-version --overwrite-version libpq

[dg0yt]

Suggested change

"port-version": 17,

[frankhale]

it took 17 attempts to get all CI builds complete. I am not sure what the process is but this should ultimately be 1. When making the changes to fix the builds vcpkg complained to me that I had to update the version so that is why it is now at 17.

[dg0yt]

I know why you did it... I didn't blame you.

[frankhale]

Thank you for mentioning how to reset the version. I appreciate that!

[dg0yt]

It is still using autotools for !windows, but meson for windows?
IMO meson should be used for all targets if supported by upstream.

[frankhale]

This is a big PR (a lot of changes) and I know your time is limited with the amount of other PRs getting submitted each day. If anyone is available to review this and has feedback and/or changes that need to be made please let me know. I'd like to get this one merged so I can submit a libpqxx port upgrade to go along with this one. Thank you!