Accept Gradle's terms of service in GitHub actions (#1870)

We need to declare that we have accepted Gradle's terms of service to
publish build scans on the default Gradle Develocity server.

**Reviewer advice:** to verify that this change really does enable
publishing of build scans, look at [the "🏠 Summary" page for this PR's
automated
tests](https://github.com/wala/WALA/actions/runs/23517812420?pr=1870).
For each job, you should see a summary that includes a white-on-blue "🐘
Build Scan®️" link button. For example:

<img width="759" height="344" alt="github
com_liblit_WALA_actions_runs_23517464924"
src="https://github.com/user-attachments/assets/548922c1-311f-49be-bf6c-892b6a499f22"
/>

Author: liblit

.github/workflows/continuous-integration.yml

@@ -59,6 +59,10 @@ jobs:
           distribution: 'zulu'
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v6
+        with:
+          build-scan-publish: true
+          build-scan-terms-of-use-url: https://gradle.com/terms-of-service
+          build-scan-terms-of-use-agree: 'yes'
       - name: Choose extra Linux-only Gradle tasks
         run: echo OS_SPECIFIC_GRADLE_TASKS='publishAllPublicationsToFakeRemoteRepository shellcheck' >> $GITHUB_ENV
         if: runner.os == 'Linux'