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/analytics_flutter.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   build_and_test:
     name: Run Test 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
 
     steps:
     - uses: actions/checkout@v3

.github/workflows/create_jira.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   create_jira:
     name: Create Jira Ticket
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
     environment: IssueTracker
     steps:
     - name: Checkout