[Chapel Merge] Bump version to 1.25 pre-release

Branch: refs/heads/master
Revision: ad2226b
Author: bradcray
Log Message:

Merge pull request #17396 from bradcray/version-1.25-prerelease

Bump version to 1.25 pre-release

[trivial/rote during this stage of the release]

This updates the version of the main development branch to 1.25 and restores the pre-release labels.

Modified Files:
M compiler/main/version_num.h

M man/confchpl.rst
M man/confchpldoc.rst
M test/compflags/bradc/printstuff/version.goodstart
M test/compflags/bradc/printstuff/versionhelp.sh

Compare: https://github.com/chapel-lang/chapel/compare/d198c611ed71...ad2226bb0a9d