Merge pull request #1896 from fermyon/backport-1859-to-v1.6

[Backport v1.6] ci: Embiggen build runner

.github/workflows/build.yml

@@ -100,11 +100,11 @@ jobs:
 
   test-rust:
     name: Test Spin SDK - Rust
-    runs-on: ${{ matrix.os }}
+    runs-on: ${{ matrix.runner }}
     needs: [lint-rust]
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        runner: [ubuntu-22.04-4core-spin, macos-latest]
     steps:
       - uses: actions/checkout@v3
 
@@ -117,13 +117,6 @@ jobs:
           bindle: true
           nomad: true
 
-      # FIXME: THIS IS THE SHORTEST-TERM OF ALL SHORT-TERM FIXES
-      - name: Rescue some space for Linux tests
-        if: matrix.os == 'ubuntu-latest'
-        run: |
-          rm -rf ./target/debug/deps
-          rm -rf ./target/debug/build
-
       - name: Cargo Unit Tests
         run: |
           make test-unit