ci: Run numeric tests in release mode to speed them up

Somehow, these take 30m on powerpc, which is too slow (much slower than
anything else.)

Author: bluss

.github/workflows/ci.yaml

@@ -48,7 +48,6 @@ jobs:
       - run: ./scripts/all-tests.sh "$FEATURES" ${{ matrix.rust }}
 
   cross_test:
-    if: ${{ github.event_name == 'merge_group' }}
     runs-on: ubuntu-latest
     strategy:
       matrix:

scripts/cross-tests.sh

@@ -11,4 +11,4 @@ cross build -v --features="$FEATURES" --target=$TARGET
 cross test -v --no-fail-fast --features="$FEATURES" --target=$TARGET
 cross test -v --no-fail-fast --target=$TARGET --manifest-path=ndarray-rand/Cargo.toml --features quickcheck
 cross test -v --no-fail-fast --target=$TARGET --manifest-path=xtest-serialization/Cargo.toml --verbose
-cross test -v --no-fail-fast --target=$TARGET --manifest-path=xtest-numeric/Cargo.toml
+cross test -v --no-fail-fast --target=$TARGET --manifest-path=xtest-numeric/Cargo.toml --release