ci(sonar): fix coverage by overriding jacoco.skip and remove empty profile (#13178)

Sonar check has been reporting [0
coverage](https://sonarcloud.io/project/overview?id=googleapis_google-cloud-java_generator)
for the last few weeks. This is because the sonar workflow incorrectly
used a profile that skips jacoco.
This PR fixes it by overriding the `jacoco.skip` setting (active by
default under the `quick-build` Maven profile) and removing the
empty/unused `full-project-coverage` profile.

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: blakeli0

.github/workflows/sdk-platform-java-sonar.yaml

@@ -79,8 +79,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN_FOR_GENERATOR }}
         run: |
-          mvn -B verify -Pquick-build \
-              -DenableFullTestCoverage \
+          mvn -B verify -Pquick-build -Djacoco.skip=false \
               -Penable-integration-tests \
               org.sonarsource.scanner.maven:sonar-maven-plugin:sonar \
               -Dsonar.projectKey=googleapis_google-cloud-java_generator \
@@ -92,7 +91,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN_FOR_SHOWCASE }}
         run: |
-          mvn -B clean verify -Pquick-build \
+          mvn -B clean verify -Pquick-build -Djacoco.skip=false \
               -DskipUnitTests \
               -Penable-integration-tests \
               -DenableShowcaseTestCoverage \

sdk-platform-java/pom.xml

@@ -82,17 +82,6 @@
       </build>
     </profile>
 
-    <profile>
-      <id>full-project-coverage</id>
-      <activation>
-        <property>
-          <name>enableFullTestCoverage</name>
-        </property>
-      </activation>
-      <modules>
-      </modules>
-    </profile>
-
     <profile>
       <id>activate-showcase-coverage</id>
       <activation>