Improve levitate detect breaking changes pipeline (#94391)

* Update .github/workflows/detect-breaking-changes-levitate.yml

Co-authored-by: Timur Olzhabayev <timur.olzhabayev@grafana.com>

---------

Co-authored-by: Timur Olzhabayev <timur.olzhabayev@grafana.com>

.github/workflows/detect-breaking-changes-levitate.yml

@@ -2,6 +2,10 @@
 ---
 name: Levitate / Detect breaking changes in PR
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 on:
   pull_request:
     paths:
@@ -11,7 +15,7 @@ on:
 
 jobs:
   buildPR:
-    name: Build PR
+    name: Build PR packages artifacts
     runs-on: ubuntu-latest
     defaults:
       run:
@@ -27,7 +31,7 @@ jobs:
 
       - name: Get yarn cache directory path
         id: yarn-cache-dir-path
-        run: echo "dir=$(yarn config get cacheFolder)" >> $GITHUB_OUTPUT
+        run: echo "dir=$(yarn config get cacheFolder)" >> "$GITHUB_OUTPUT"
 
       - name: Restore yarn cache
         uses: actions/cache@v4
@@ -57,7 +61,7 @@ jobs:
           path: './pr/pr_built_packages.zip'
 
   buildBase:
-    name: Build Base
+    name: Build Base packages artifacts
     runs-on: ubuntu-latest
     defaults:
       run:
@@ -75,7 +79,7 @@ jobs:
 
       - name: Get yarn cache directory path
         id: yarn-cache-dir-path
-        run: echo "dir=$(yarn config get cacheFolder)" >> $GITHUB_OUTPUT
+        run: echo "dir=$(yarn config get cacheFolder)" >> "$GITHUB_OUTPUT"
 
       - name: Restore yarn cache
         uses: actions/cache@v4
@@ -105,7 +109,7 @@ jobs:
           path: './base/base_built_packages.zip'
 
   Detect:
-    name: Detect breaking changes
+    name: Detect breaking changes between PR and base
     runs-on: ubuntu-latest
     needs: ['buildPR', 'buildBase']
     env:
@@ -179,7 +183,7 @@ jobs:
 
 
   Report:
-    name: Report breaking changes in PR
+    name: Report breaking changes in PR comment
     runs-on: ubuntu-latest
     needs: ['Detect']
 
@@ -234,9 +238,9 @@ jobs:
               echo 'levitate_markdown<<EOF'
               cat levitate.md
               echo EOF
-            } >> $GITHUB_OUTPUT
+            } >> "$GITHUB_OUTPUT"
             else
-              echo "levitate_markdown=No breaking changes detected" >> $GITHUB_OUTPUT
+              echo "levitate_markdown=No breaking changes detected" >> "$GITHUB_OUTPUT"
             fi
 
 
@@ -253,7 +257,6 @@ jobs:
             ${{ steps.levitate-markdown.outputs.levitate_markdown }}
 
             [Read our guideline](https://github.com/grafana/grafana/blob/main/contribute/breaking-changes-guide/breaking-changes-guide.md)
-            [Console output](${{ steps.levitate-run.outputs.job_link }})
 
             * Your pull request merge won't be blocked.
           GITHUB_TOKEN: ${{ steps.generate_token.outputs.token }}
@@ -359,5 +362,6 @@ jobs:
           if [ "${{ steps.levitate-run.outputs.exit_code }}" -ne 0 ]; then
             echo "Breaking changes detected. Please check the levitate report in your pull request. This workflow won't block merging."
           fi
+
           exit ${{ steps.levitate-run.outputs.exit_code }}
         shell: bash