upload binaries to private jfrog repo

also remove some old unused workflows:
- .github/workflows/tiiuae-gzebo-data.yaml
- .github/workflows/tiiuae-pixhawk-artifact-publish.yaml

.github/workflows/tiiuae-pixhawk-and-saluki.yaml

@@ -186,7 +186,7 @@ jobs:
           JF_ENV_1: ${{ secrets.ARTIFACTORY_CLOUD_TOKEN }}
       - name: Upload px4-firmware build to Artifactory
         env:
-          ARTIFACTORY_GEN_REPO: ssrc-gen-public-local
+          ARTIFACTORY_GEN_REPO: ssrc-gen-private-local
           BUILD_NAME_PX4: px4-firmware
           CI: true
         run: |
@@ -269,7 +269,7 @@ jobs:
 
           pr_or_empty=""
           if [ ${{ github.event_name }} == 'pull_request' ]; then
-            pr_or_empty="pr/"
+            pr_or_empty="pr/${{ github.head_ref || github.ref_name }}/"
           fi
 
           newline=$'\n'

.github/workflows/tiiuae-sitl.yaml

@@ -78,7 +78,7 @@ jobs:
 
       - name: Upload to Artifactory (px4-sitl)
         env:
-          ARTIFACTORY_GEN_REPO: ssrc-gen-public-local
+          ARTIFACTORY_GEN_REPO: ssrc-gen-private-local
           BUILD_NAME: px4-sitl
           CI: true
         if: github.event_name == 'push'