ci: Fix gh action manual trigger error

This patch fixes the error that occurs
when manually triggering the homebrew and
minikube update PR. The fix deletes the PR
branches if it already exists to prevent
error.
Signed-off-by: Santhosh Nagaraj S <santhosh@kinvolk.io>

.github/workflows/pr-to-update-homebrew.yml

@@ -44,6 +44,7 @@ jobs:
           repository: kinvolk/homebrew-cask
           path: homebrew-cask
           token: ${{ secrets. KINVOLK_REPOS_TOKEN }}
+          fetch-depth: 0
       - name: Update headlamp version in homebrew-cask
         run: |
           user=${{github.actor}}
@@ -51,6 +52,14 @@ jobs:
             user=yolossn
           fi
           cd homebrew-cask
+          if git branch -l | grep -q "update_headlamp_$HEADLAMP_VERSION"; then
+            echo "deleting old branch from local to avoid conflict"
+            git branch -D "update_headlamp_$HEADLAMP_VERSION"
+          fi
+          if git branch -a | grep -q "origin/update_headlamp_$HEADLAMP_VERSION"; then
+            echo "deleting old branch from remote to avoid conflict"
+            git push origin --delete "update_headlamp_$HEADLAMP_VERSION"
+          fi 
           HEADLAMP_VERSION=${LATEST_HEADLAMP_TAG:1}
           wget "https://github.com/kinvolk/headlamp/releases/download/$LATEST_HEADLAMP_TAG/checksums.txt"
           ARM_SHA=$(cat checksums.txt | grep .arm64.dmg | awk -F" " '{print $1}')

.github/workflows/pr-to-update-minikube.yml

@@ -46,6 +46,7 @@ jobs:
           repository: kinvolk/minikube
           path: minikube
           token: ${{ secrets. KINVOLK_REPOS_TOKEN }}
+          fetch-depth: 0
       - name: Update headlamp version in minikube 
         run: |
           user=${{github.actor}}
@@ -56,7 +57,15 @@ jobs:
           LATEST_HEADLAMP_SHA=$(gh api \
           "/orgs/kinvolk/packages/container/headlamp/versions" --jq "map(select(.metadata.container.tags[] | contains(\"$LATEST_HEADLAMP_TAG\"))) | .[].name")
           echo $LATEST_HEADLAMP_SHA
-          cd minikube    
+          cd minikube
+          if git branch -l | grep -q "update_headlamp_$HEADLAMP_VERSION"; then
+            echo "deleting old branch from local to avoid conflict"
+            git branch -D "update_headlamp_$HEADLAMP_VERSION"
+          fi
+          if git branch -a | grep -q "origin/update_headlamp_$HEADLAMP_VERSION"; then
+            echo "deleting old branch from remote to avoid conflict"
+            git push origin --delete "update_headlamp_$HEADLAMP_VERSION"
+          fi 
           git checkout -b "update_headlamp_$HEADLAMP_VERSION" 
           sed -i "s/kinvolk\/headlamp:v.*/kinvolk\/headlamp:$LATEST_HEADLAMP_TAG@$LATEST_HEADLAMP_SHA\",/g" ./pkg/minikube/assets/addons.go
           git diff