Trigger e2e in PR if e2e label is added

Author: ChristianZaccaria

.github/dependabot.yml

@@ -15,6 +15,7 @@ updates:
         update-types: ["version-update:semver-patch"]
     open-pull-requests-limit: 4
     labels:
+      - "dependabot"
       - "test-guided-notebooks"
 
   # pip means poetry in this case, this keeps poetry.lock up to date with constraints in pyproject.toml.
@@ -27,6 +28,7 @@ updates:
         update-types: ["version-update:semver-patch"]
     open-pull-requests-limit: 1
     labels:
+      - "dependabot"
       - "test-guided-notebooks"
 
   # npm means yarn in this case, this keeps yarn.lock up to date with constraints in package.json.
@@ -39,4 +41,5 @@ updates:
         update-types: ["version-update:semver-patch"]
     open-pull-requests-limit: 1
     labels:
+      - "dependabot"
       - "test-ui-notebooks"

.github/workflows/dependabot-labeler.yaml

@@ -4,10 +4,11 @@ name: Dependabot Labeler
 
 on:
   pull_request:
+    types: [ labeled ]
 
 jobs:
     add-approve-lgtm-label:
-        if: github.actor == 'dependabot[bot]'
+        if: github.actor == 'dependabot[bot]' && contains(github.event.pull_request.labels.*.name, 'dependabot')
         runs-on: ubuntu-latest
         steps:
             - name: Add approve and lgtm labels to Dependabot PR

.github/workflows/e2e_tests.yaml

@@ -2,6 +2,7 @@ name: e2e
 
 on:
   pull_request:
+    types: [ labeled, synchronize, opened, reopened ]
     branches:
       - main
       - 'release-*'
@@ -30,7 +31,7 @@ env:
 
 jobs:
   kubernetes:
-
+    if: contains(github.event.pull_request.labels.*.name, 'e2e') || github.event_name == 'merge_group'
     runs-on: ubuntu-20.04-4core-gpu
 
     steps: