Migrate the Github Actions to the new YAML syntax (#16981)

.github/workflows/pull_request-add-the-first-time-contributor-label-to-prs-opened-by-first-time-contributors.yml

@@ -0,0 +1,16 @@
+on: pull_request
+name: Add the First-time Contributor label to PRs opened by first-time contributors
+jobs:
+  filterOpened:
+    name: Filter opened
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Filter opened
+      uses: actions/bin/filter@0dbb077f64d0ec1068a644d25c71b1db66148a24
+      with:
+        args: action opened
+    - name: First Time Contributor
+      uses: ./.github/actions/first-time-contributor
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pull_request-assign-fixed-issues-when-pull-request-opened.yml

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+on: pull_request
+name: Assign fixed issues when pull request opened
+jobs:
+  filterOpened:
+    name: Filter opened
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Filter opened
+      uses: actions/bin/filter@0dbb077f64d0ec1068a644d25c71b1db66148a24
+      with:
+        args: action opened
+    - name: Assign Fixed Issues
+      uses: ./.github/actions/assign-fixed-issues
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pull_request-milestone-merged-pull-requests.yml

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+on: pull_request
+name: Milestone merged pull requests
+jobs:
+  milestoneIt:
+    name: Milestone It
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Milestone It
+      uses: ./.github/actions/milestone-it
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}