Upgrade FreeBSD CI images to 14.2

Hi,

FreeBSD CI 14.2 image is available now [1], also the version suffix is
removed from the image family name [2].

The patches to use these images in the Postgres CI are attached.
Unfortunately, patches do not apply cleanly to any other version. So,
there are 4 patches for REL_[15 | 16 | 17] and upstream.

Any kind of feedback would be appreciated.

[1] https://github.com/anarazel/pg-vm-images/commit/3f2d728299808e76ce23b9b12ccfec944c86e318
[2] https://github.com/anarazel/pg-vm-images/commit/f1ea53c94ab864feb7c23d609bf85f0a1d568c9d

-- 
Regards,
Nazir Bilal Yavuz
Microsoft