Increase concurrent of daily Turbopack test runs (#63939)

## What?

Both of these run on a schedule that is before the start of the day in
Europe and after usual office hours in the US, meaning we have a lot of
leftover idle machines at that point that can make this test run
quicker.

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Closes NEXT-2967

.github/workflows/turbopack-nextjs-build-integration-tests.yml

@@ -63,7 +63,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        group: [1, 2, 3, 4, 5, 6]
+        group: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
 
     steps:
       - uses: actions/cache/restore@v3
@@ -84,7 +84,7 @@ jobs:
 
       - name: Run test/production
         run: |
-          NEXT_TEST_MODE=start TURBOPACK=1 TURBOPACK_BUILD=1 node run-tests.js -g ${{ matrix.group }}/6 -c ${TEST_CONCURRENCY} --type production
+          NEXT_TEST_MODE=start TURBOPACK=1 TURBOPACK_BUILD=1 node run-tests.js -g ${{ matrix.group }}/12 -c ${TEST_CONCURRENCY} --type production
         # It is currently expected to fail some of next.js integration test, do not fail CI check.
         continue-on-error: true
 

.github/workflows/turbopack-nextjs-dev-integration-tests.yml

@@ -63,7 +63,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        group: [1, 2, 3, 4, 5, 6]
+        group: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
 
     steps:
       - uses: actions/cache/restore@v3
@@ -84,7 +84,7 @@ jobs:
 
       - name: Run test/development
         run: |
-          NEXT_TEST_MODE=dev TURBOPACK=1 TURBOPACK_DEV=1 node run-tests.js -g ${{ matrix.group }}/6 -c ${TEST_CONCURRENCY} --type development
+          NEXT_TEST_MODE=dev TURBOPACK=1 TURBOPACK_DEV=1 node run-tests.js -g ${{ matrix.group }}/12 -c ${TEST_CONCURRENCY} --type development
         # It is currently expected to fail some of next.js integration test, do not fail CI check.
         continue-on-error: true