Update rts-build-selfhost.yml (#29124)

.github/workflows/rts-build-selfhost.yml

@@ -68,6 +68,11 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 0
+          
+      - name: Install necessary packages
+        run: |
+           sudo apt-get update
+           sudo apt-get install -y gawk
 
       - name: Figure out the PR number
         run: echo ${{ inputs.pr }}
@@ -127,13 +132,6 @@ jobs:
           echo version=$next_version-SNAPSHOT >> $GITHUB_OUTPUT
           echo tag=$(echo ${GITHUB_REF:11}) >> $GITHUB_OUTPUT
 
-      - name: Install tmux
-        run: |
-           sudo apt-get update
-           sudo apt-get install -y tmux
-
-      - name: Setup upterm session
-        uses: lhotari/action-upterm@v1
 
       # Install all the dependencies
       - name: Install dependencies