feat(ci): Add rc prefix to artifactory paths

Store rc/* branch builds in 'rc/' directory in Artifactory,
separate from dev and stable builds. This provides clear
organization of release candidate artifacts.

Artifactory structure:
- dev/: ionos-dev branch and PR builds
- stable/: ionos-stable branch builds
- rc/: rc/* branch builds

Author: printminion-co

.github/workflows/build-artifact.yml

@@ -764,12 +764,17 @@ jobs:
         run: |
           # PR builds are stored in a separate directory as "dev/pr/nextcloud-workspace-pr-<number>.zip"
           # Push to "ionos-dev" branch is stored as "dev/nextcloud-workspace-<ncVersion>.zip"
+          # Push to "ionos-stable" branch is stored as "stable/nextcloud-workspace-<ncVersion>.zip"
+          # Push to "rc/*" branches is stored as "rc/nextcloud-workspace-<ncVersion>.zip"
 
           ARTIFACTORY_STAGE_PREFIX="dev"
 
           # set ARTIFACTORY_STAGE_PREFIX=stable on ionos-stable branch
           if [ "${{ github.ref_name }}" == "ionos-stable" ]; then
               ARTIFACTORY_STAGE_PREFIX="stable"
+          # set ARTIFACTORY_STAGE_PREFIX=rc on rc/* branches
+          elif [[ "${{ github.ref_name }}" == "rc/"* ]]; then
+              ARTIFACTORY_STAGE_PREFIX="rc"
           fi
 
           export PATH_TO_DIRECTORY="${{ env.ARTIFACTORY_REPOSITORY_SNAPSHOT }}/${ARTIFACTORY_STAGE_PREFIX}"