ci: migrate runs-on to Twilio runner labels

Repoints runs-on to the standard Twilio runner labels for this repo.
Unmapped runners (macOS, matrix expressions, etc.) left as-is.

Author: charlottestjohn

.github/workflows/pr-lint.yml

@@ -6,7 +6,7 @@ on:
 jobs:
   validate:
     name: Validate title
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
     steps:
       - uses: amannn/action-semantic-pull-request@v4
         with:

.github/workflows/test-and-deploy.yml

@@ -13,7 +13,7 @@ on:
 jobs:
   test:
     name: Test
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
     timeout-minutes: 20
     strategy:
       matrix:
@@ -43,7 +43,7 @@ jobs:
     name: Deploy
     if: success() && github.ref_type == 'tag'
     needs: [ test ]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
     steps:
       - name: Checkout sendgrid-php
         uses: actions/checkout@v2
@@ -74,7 +74,7 @@ jobs:
     name: Slack notify on failure
     if: failure() && github.event_name != 'pull_request' && (github.ref == 'refs/heads/main' || github.ref_type == 'tag')
     needs: [ test, deploy ]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
     steps:
       - uses: rtCamp/action-slack-notify@v2
         env: