[WIP] workflow: remove tag

Inspired by the fact that the "draft" release (previous change)
generated the URL

   https://github.com/<OWNER AND REPO>/releases/tag/untagged-<HASH>

I thought it might not complain about no present tag.

This attempts creating a draft release without a tag.

Benefit: repo is not "polluted" (although this is not too bad) with
snapshot tags.

Let's try it ...

.github/workflows/easycloud-build.yml

@@ -89,10 +89,8 @@ jobs:
 
       - name: Build package name
         run: |
-          TAG_NAME="rel-$( date '+%Y%m%d-%H%M%S' )"
-          SAFE_REF_NAME=${GITHUB_REF_NAME/\//-}
-          echo "TAG_NAME=${TAG_NAME}" >> ${GITHUB_ENV}
-          echo "PACKAGE_NAME=${PACKAGE_NAME_PREFIX}-${TAG_NAME}.${PACKAGE_NAME_EXTENSION}" >> ${GITHUB_ENV}
+          SNAP_RELEASE_NAME="rel-$( date '+%Y%m%d-%H%M%S' )"
+          echo "PACKAGE_NAME=${PACKAGE_NAME_PREFIX}-${SNAP_RELEASE_NAME}.${PACKAGE_NAME_EXTENSION}" >> ${GITHUB_ENV}
 
       - name: Zip dependencies
         run: make -f IONOS/Makefile zip_dependencies TARGET_PACKAGE_NAME=${{ env.PACKAGE_NAME }}
@@ -105,7 +103,6 @@ jobs:
         with:
           draft: true
           prerelease: true
-          tag_name: ${{ env.TAG_NAME }}
           files: |
             ${{ env.PACKAGE_NAME }}
             ${{ env.PACKAGE_NAME }}.sha256