Re-enable some tests

Author: marcprux

.github/workflows/ci.yml

@@ -253,11 +253,9 @@ jobs:
           cat run-tests.sh
 
       - name: Run swift-collections tests
-        if: false
         run: ./run-tests.sh apple/swift-collections
 
       - name: Run swift-numerics tests
-        if: false
         run: ./run-tests.sh apple/swift-numerics
 
       - name: Run swift-algorithms tests
@@ -267,7 +265,6 @@ jobs:
         run: ./run-tests.sh apple/swift-atomics
 
       - name: Run swift-system tests
-        if: false
         run: ./run-tests.sh apple/swift-system
 
       - name: Run swift-crypto tests