ci: migrate runs-on to Twilio runner labels + SHA-pin actions

Author: charlottestjohn

.github/workflows/analytics_flutter.yml

@@ -11,17 +11,17 @@ on:
 jobs:
   build_and_test:
     name: Run Test 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744  # v3
 
-    - uses: actions/setup-java@v3
+    - uses: actions/setup-java@17f84c3641ba7b8f6deff6309fc4c864478f5d62  # v3
       with:
         distribution: 'zulu'
         java-version: "13.0.13+5"
 
-    - uses: subosito/flutter-action@v2
+    - uses: subosito/flutter-action@1a449444c387b1966244ae4d4f8c696479add0b2  # v2
       with:
         channel: stable
         flutter-version: 3.29.2

.github/workflows/create_jira.yml

@@ -8,13 +8,13 @@ on:
 jobs:
   create_jira:
     name: Create Jira Ticket
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-large
     environment: IssueTracker
     steps:
     - name: Checkout
-      uses: actions/checkout@master
+      uses: actions/checkout@61b9e3751b92087fd0b06925ba6dd6314e06f089  # master
     - name: Login
-      uses: atlassian/gajira-login@master
+      uses: atlassian/gajira-login@c22a5debd482401472b285de4f6deedf70ddbb92  # master
       env:
         JIRA_BASE_URL: ${{ secrets.JIRA_BASE_URL }}
         JIRA_USER_EMAIL: ${{ secrets.JIRA_USER_EMAIL }}
@@ -24,7 +24,7 @@ jobs:
 
     - name: Create
       id: create
-      uses: atlassian/gajira-create@master
+      uses: atlassian/gajira-create@1c54357fdde9dab6273a0e26d67cb175ffffe498  # master
       with:
         project: ${{ secrets.JIRA_PROJECT }}
         issuetype: Bug