Support lsstinstall in EUPS tag queries.

Currently, the best way to get the EUPS tag is to manually read ups_db.
Later containers may include the tag as a container label.
newinstall-based containers are supported as a fallback option.

.github/workflows/build-base.yml

@@ -71,7 +71,7 @@ jobs:
           fi
           echo "Docker tag = $(< lsst.docker.tag)"
           echo "Stack tag = $(< stack.tag)"
-          docker run "$PIPE_CONTAINER":"$(< lsst.docker.tag)" bash -c "cat stack/miniconda*/ups_db/global.tags" > eups.tag || echo "Unknown" > eups.tag
+          docker run "$PIPE_CONTAINER":"$(< lsst.docker.tag)" bash -c "cat stack/conda/envs/lsst-scipipe-*/share/eups/ups_db/global.tags" > eups.tag || docker run "$PIPE_CONTAINER":"$(< lsst.docker.tag)" bash -c "cat stack/miniconda*/ups_db/global.tags" > eups.tag || echo "Unknown" > eups.tag
           echo "Eups tag = $(< eups.tag)"
       - name: Build image
         # Context-free build

.github/workflows/build-service.yml

@@ -96,7 +96,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Determine eups tag
         run: |
-          docker run ghcr.io/${{ github.repository_owner }}/prompt-base:"$BASE_TAG" bash -c "cat stack/miniconda*/ups_db/global.tags" > eups.tag || echo "Unknown" > eups.tag
+          docker run ghcr.io/${{ github.repository_owner }}/prompt-base:"$BASE_TAG" bash -c "cat stack/conda/envs/lsst-scipipe-*/share/eups/ups_db/global.tags" > eups.tag || docker run ghcr.io/${{ github.repository_owner }}/prompt-base:"$BASE_TAG" bash -c "cat stack/miniconda*/ups_db/global.tags" > eups.tag || echo "Unknown" > eups.tag
           echo "Eups tag = $(< eups.tag)"
       - name: Build image
         run: |