[chapel-lang/chapel] Update version to 1.22.2, preparing for Shasta v1.

Branch: refs/heads/release/1.22
Revision: 94ad268
Author: gbtitus
Log Message:

Merge pull request #16228 from gbtitus/release-1.22.2

Update version to 1.22.2, preparing for Shasta v1.3 releases.

(Reviewed by @jhoole and @bradcray.)

Shasta v1.3 development and maintenance will be based on the 1.22
release sources rather than the more volatile master branch. Here,
prepare the release/1.22 branch for that, by updating the version

Modified Files:
M compiler/main/version_num.h
M doc/rst/conf.py
M doc/rst/usingchapel/QUICKSTART.rst
M doc/rst/usingchapel/chplenv.rst
M man/confchpl.rst
M man/confchpldoc.rst
M test/compflags/bradc/printstuff/version.goodstart

Compare: https://github.com/chapel-lang/chapel/compare/ec702567c319...94ad2686174d