Run main tests separately from publishing

In practice, I'll have to push to both `master`, and whatever tag I
create. As such, I can wait for the tests on `master` to complete before
I push a tag. That will reduce redundant test running, and make the
publish workflow faster.

.github/workflows/publish.yml

@@ -14,11 +14,8 @@ defaults:
     shell: bash -euxo pipefail {0}
 
 jobs:
-  test:
-    uses: ./.github/workflows/test.yml
   build-packages:
     name: Build distribution packages
-    needs: test
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4