Go back to cross compiling and only run size tests

- Use platform-default Windows toolchain with 32-bit target again.
- Remove the "cargo check default features" step.
- Filter the tests so only those with "size" in their name are run.
- Rename job from to `test-32bit-windows-size`.

Author: EliahKagan

.github/workflows/ci.yml

@@ -309,22 +309,23 @@ jobs:
           GIX_TEST_IGNORE_ARCHIVES: '1'
         run: cargo nextest run --workspace --no-fail-fast
 
-  test-32bit-windows:
+  test-32bit-windows-size:
     runs-on: windows-latest
 
+    env:
+      TARGET: i686-pc-windows-msvc
+
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: stable-i686-pc-windows-msvc
+          targets: ${{ env.TARGET }}
       - uses: Swatinem/rust-cache@v2
-      - name: cargo check default features
-        run: cargo check --workspace --bins --examples
       - uses: taiki-e/install-action@v2
         with:
           tool: nextest
       - name: Test (nextest)
-        run: cargo nextest run --workspace --no-fail-fast
+        run: cargo nextest run --target $env:TARGET --workspace --no-fail-fast size
 
   lint:
     runs-on: ubuntu-latest
@@ -521,7 +522,7 @@ jobs:
       - test-fast
       - test-fixtures-windows
       - test-32bit
-      - test-32bit-windows
+      - test-32bit-windows-size
       - lint
       - cargo-deny
       - check-packetline