databases/mongodb70: add do-test and update to 7.0.12
Changes:
https://www.mongodb.com/docs/manual/release-notes/7.0/#7.0.12---jun-28--2024
The port has had situations in which the code compiled, but the
executables did not work. Try to catch this early with make test.
- new mozjs version
- autoconf is unused now
- pet portclippy, portfmt, portlint
- pkg-message: use default mongo portnr instead of portnr used by unifi.