Fix: pipelines not passing on not-supported Ubuntu version.

Switch to newest LTS version

Author: kubabuczak

.github/workflows/arm-Ubuntu-build-test-push-workflow.yml

@@ -102,7 +102,7 @@ jobs:
       run: |
         export PLATFORMS=linux/arm64,linux/amd64
         export BASE_IMAGE=ubuntu
-        export BASE_IMAGE_VERSION=24.10
+        export BASE_IMAGE_VERSION=24.04
         export IMG=${{ secrets.ECR_REPOSITORY }}/${{ env.SPLUNK_OPERATOR_IMAGE_NAME }}:$GITHUB_SHA
         make docker-buildx PLATFORMS=$PLATFORMS BASE_IMAGE=$BASE_IMAGE BASE_IMAGE_VERSION=$BASE_IMAGE_VERSION IMG=$IMG 
     - name: Sign Splunk Operator image with a key

.github/workflows/arm-Ubuntu-int-test-workflow.yml

@@ -51,7 +51,7 @@ jobs:
       run: |
         export PLATFORMS=linux/arm64,linux/amd64
         export BASE_IMAGE=ubuntu
-        export BASE_IMAGE_VERSION=24.10
+        export BASE_IMAGE_VERSION=24.04
         export IMG=${{ secrets.ECR_REPOSITORY }}/${{ env.SPLUNK_OPERATOR_IMAGE_NAME }}:$GITHUB_SHA
         make docker-buildx PLATFORMS=$PLATFORMS BASE_IMAGE=$BASE_IMAGE BASE_IMAGE_VERSION=$BASE_IMAGE_VERSION IMG=$IMG
   int-tests-arm-ubuntu: