Chore: use new `pa11y-ci` version (#52953)

* use new pa11y-ci version, update some thresholds and set standard to WCAG2AA

* remove unneeded comment

* PRs won't have unified alerting enabled...

.drone.yml

@@ -450,7 +450,7 @@ steps:
     HOST: grafana-server
     PORT: 3001
   failure: always
-  image: grafana/docker-puppeteer:1.0.0
+  image: grafana/docker-puppeteer:1.1.0
   name: test-a11y-frontend
 - commands:
   - ./bin/grabpl build-docker --edition oss -archs amd64
@@ -1207,7 +1207,7 @@ steps:
     HOST: grafana-server
     PORT: 3001
   failure: ignore
-  image: grafana/docker-puppeteer:1.0.0
+  image: grafana/docker-puppeteer:1.1.0
   name: test-a11y-frontend
 - commands:
   - ./bin/grabpl store-storybook --deployment canary --src-bucket grafana-storybook
@@ -4986,6 +4986,6 @@ kind: secret
 name: gcp_upload_artifacts_key
 ---
 kind: signature
-hmac: 63ee096e5fd4d4147f43465937c4976e0d64a1dffa74206282cd9c8edf6494c0
+hmac: d97f2ec8017ba6e3f16913e08ee1d53c4e653f87b6113fd3763e1ad557306810
 
 ...

.pa11yci-pr.conf.js

@@ -3,6 +3,7 @@ var config = {
     concurrency: 1,
     runners: ['axe'],
     useIncognitoBrowserContext: false,
+    standard: 'WCAG2AA',
     chromeLaunchConfig: {
       args: ['--no-sandbox'],
     },
@@ -60,7 +61,7 @@ var config = {
       rootElement: '.main-view',
       // the unified alerting promotion alert's content contrast is too low
       // see https://github.com/grafana/grafana/pull/41829
-      threshold: 5,
+      threshold: 4,
     },
     {
       url: '${HOST}/datasources',
@@ -96,7 +97,7 @@ var config = {
       url: '${HOST}/org/apikeys',
       wait: 500,
       rootElement: '.main-view',
-      threshold: 4,
+      threshold: 3,
     },
     {
       url: '${HOST}/dashboards',

.pa11yci.conf.js

@@ -3,6 +3,7 @@ var config = {
     concurrency: 1,
     runners: ['axe'],
     useIncognitoBrowserContext: false,
+    standard: 'WCAG2AA',
     chromeLaunchConfig: {
       args: ['--no-sandbox'],
     },

scripts/drone/steps/lib.star

@@ -598,7 +598,7 @@ def test_a11y_frontend_step(ver_mode, edition, port=3001):
 
     return {
         'name': 'test-a11y-frontend' + enterprise2_suffix(edition),
-        'image': 'grafana/docker-puppeteer:1.0.0',
+        'image': 'grafana/docker-puppeteer:1.1.0',
         'depends_on': [
             'grafana-server' + enterprise2_suffix(edition),
         ],

scripts/generate-a11y-report.sh

@@ -27,7 +27,7 @@ else
 fi
 
 # Run accessibility command
-yarn dlx --quiet pa11y-ci@pa11y/pa11y-ci#6b2d4f54efe445ad551472acc1877fe7542ac085 --config .pa11yci.conf.js --json > pa11y-ci-results.json
+yarn dlx --quiet pa11y-ci@3.0.1 --config .pa11yci.conf.js --json > pa11y-ci-results.json
 
 # Generate HTML report
 yarn dlx pa11y-ci-reporter-html@3.0.1 pa11y-ci-reporter-html