ci: another windows pre-test check

Run a test script without perl/prove before attempting to run `make
prove`. This is meant to help narrow down the cause of the next,
inevitable msys2 breakage.

.github/workflows/ci.yml

@@ -232,6 +232,14 @@ jobs:
  shell: msys2 {0}
  run: |
  cargo --locked --quiet run --profile=release -- version
+ - name: Pre-test Check 2
+ shell: msys2 {0}
+ env:
+ STG_PROVE_OPTS: "--jobs=2"
+ STG_TEST_OPTS: "--verbose-log"
+ STG_PROFILE: "release"
+ run: |
+ make -C t t0000-init.sh
  - name: Test
  shell: msys2 {0}
  env: