chore: remove obsolete kokoro configs and update DocFX profile (#1934)

* chore: update DocFx profile

* remove obsolete kokoro configs

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* remove ci.yaml from owlbot post-processing

* remove 21 from matrix

* fix dependencies script

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* update dependencies

* fix major version format

* remove 21 from testing

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

.github/workflows/ci.yaml

@@ -30,7 +30,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-java@v3
       with:
-        distribution: zulu
+        distribution: temurin
         java-version: ${{matrix.java}}
     - run: java -version
     - run: .kokoro/build.sh
@@ -44,7 +44,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-java@v3
       with:
-        distribution: zulu
+        distribution: temurin
         java-version: 8
     - run: java -version
     - run: .kokoro/build.bat
@@ -59,7 +59,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-java@v3
       with:
-        distribution: zulu
+        distribution: temurin
         java-version: ${{matrix.java}}
     - run: java -version
     - run: .kokoro/dependencies.sh
@@ -69,7 +69,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-java@v3
       with:
-        distribution: zulu
+        distribution: temurin
         java-version: 11
     - run: java -version
     - run: .kokoro/build.sh
@@ -81,33 +81,33 @@ jobs:
     - uses: actions/checkout@v3
     - uses: actions/setup-java@v3
       with:
-        distribution: zulu
+        distribution: temurin
         java-version: 8
     - run: java -version
     - run: .kokoro/build.sh
       env:
         JOB_TYPE: clirr
-  # compilation failure for sub-modules using source and target options 7 (this  setting cannot be upgraded to Java 21 because some modules support max of Java 8) 
-  # Hence compile in Java 8 and test in Java 21.    
+  # compilation failure for sub-modules using source and target options 7 (this  setting cannot be upgraded to Java 21 because some modules support max of Java 8)
+  # Hence compile in Java 8 and test in Java 21.
   units-java21:
     # Building using Java 8 and run the tests with Java 21 runtime
     name: "units (21)"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-java@v3
-        with:
-          java-version: 21
-          distribution: temurin
-      - name: "Set jvm system property environment variable for surefire plugin (unit tests)"
-        # Maven surefire plugin (unit tests) allows us to specify JVM to run the tests.
-        # https://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html#jvm
-        run: echo "SUREFIRE_JVM_OPT=-Djvm=${JAVA_HOME}/bin/java" >> $GITHUB_ENV
-        shell: bash
-      - uses: actions/setup-java@v3
-        with:
-          java-version: 8
-          distribution: temurin
-      - run: .kokoro/build.sh
-        env:
-          JOB_TYPE: test
+    - uses: actions/checkout@v3
+    - uses: actions/setup-java@v3
+      with:
+        java-version: 21
+        distribution: temurin
+    - name: "Set jvm system property environment variable for surefire plugin (unit tests)"
+      # Maven surefire plugin (unit tests) allows us to specify JVM to run the tests.
+      # https://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html#jvm
+      run: echo "SUREFIRE_JVM_OPT=-Djvm=${JAVA_HOME}/bin/java" >> $GITHUB_ENV
+      shell: bash
+    - uses: actions/setup-java@v3
+      with:
+        java-version: 8
+        distribution: temurin
+    - run: .kokoro/build.sh
+      env:
+        JOB_TYPE: test

.kokoro/dependencies.sh

@@ -38,7 +38,10 @@ function determineMavenOpts() {
       | sed -E 's/^(1\.[0-9]\.0).*$/\1/g'
   )
 
-  if [[ $javaVersion == 17* ]]
+  # Extract the major version for simple comparison
+  local javaMajorVersion=$(echo $javaVersion | cut -d'.' -f1)
+
+  if [[ $javaMajorVersion -ge 17 ]]
     then
       # MaxPermSize is no longer supported as of jdk 17
       echo -n "-Xmx1024m"