Consolidate regression tests, run on 'needs-ci' label only

.github/workflows/test_basic.yaml

@@ -0,0 +1,39 @@
+name: Regression tests
+on:
+  pull_request:
+    branches: [ "main" ]
+    types: [ labeled ]
+jobs:
+  dry_run:
+    if: ${{ github.event.label.name == 'needs-ci' }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install python dependencies
+      run: |
+        python -m pip install -r requirements.txt
+    - name: Run examples
+      run: |
+        python3 example.py --dry-run
+  sqmag:
+    if: ${{ github.event.label.name == 'needs-ci' }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install python dependencies
+      run: |
+        python -m pip install -r requirements.txt
+    - name: Run examples
+      run: |
+        (cd paper/scripts && ./slothy_sqmag.sh)
+  fft:
+    if: ${{ github.event.label.name == 'needs-ci' }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install python dependencies
+      run: |
+        python -m pip install -r requirements.txt
+    - name: Run examples
+      run: |
+        (cd paper/scripts && ./slothy_fft.sh)

.github/workflows/test_script_kyber_ntt_a55.yaml

@@ -2,8 +2,10 @@ name: Kyber NTT Cortex-A55
 on:
   pull_request:
     branches: [ "main" ]
+    types: [ labeled ]
 jobs:
   build_test:
+    if: ${{ github.event.label.name == 'needs-ci' }}
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3

.github/workflows/test_script_ntt_helium.yaml

@@ -2,8 +2,10 @@ name: Helium NTT
 on:
   pull_request:
     branches: [ "main" ]
+    types: [ labeled ]
 jobs:
   build_test:
+    if: ${{ github.event.label.name == 'needs-ci' }}
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3