Use ubuntu-latest GitHub Actions runner for Linux builds

A full build requires a lot of disk space. I believe this is mostly
due to the large number of Docker images that the tests utilize. By
default, the amount of free disk space on an ubuntu-latest runner
does not meet or needs. In this commit, we work around this using
the free-disk-space action which deletes things like the Android
SDK and Haskell installations that are both large and not needed by
our builds.

Closes gh-40705

.github/workflows/build-pull-request.yml

@@ -7,9 +7,14 @@ permissions:
 jobs:
   build:
     name: Build Pull Request
-    runs-on: ubuntu22-8-32-OSS
+    runs-on: ubuntu-latest
     if: ${{ github.repository == 'spring-projects/spring-boot' }}
     steps:
+      - name: Free Disk Space
+        uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be # v1.3.1
+        with:
+          large-packages: false
+          docker-images: false
       - name: Set Up JDK 17
         uses: actions/setup-java@v4
         with: