Fix CI ignored regression workflows

We defined some paths to ignore regression test workflows when, for
example, we change the CHANGELOG.md and others. But in fact it was not
happening because we didn't define a proper name in the fake regression
workflow that fake to the CI that some required status passed.

Fixed it defining a proper regression name like we do for the regular
regression workflow.

.github/workflows/linux-build-and-test-ignored.yaml

@@ -36,6 +36,8 @@ jobs:
         fi
 
   regress:
+    name: PG${{ matrix.pg }}${{ matrix.snapshot }} ${{ matrix.name }} ${{ matrix.os }}
+    needs: matrixbuilder
     runs-on: ubuntu-latest
     steps:
       - run: |