docs(sample): Add sample for Native Image support in Logging

[mpeddada1]

This PR copies over the Logging sample, Setup Instructions and README for native image support from GoogleCloudPlatform/native-image-support-java. It also adds an integration test that can be run as a native image.

Calling mvn package -Pnative -DskipTests builds the native image executable for the application and calling mvn test -Pnative runs the test as a native image.

For more information: https://graalvm.github.io/native-build-tools/latest/maven-plugin.html#configuration

[generated-files-bot]

Warning: This pull request is touching the following templated files:

• samples/pom.xml

[suztomo]

Approving but the Java version should be 1.8.

[losalex]

Approving but the Java version should be 1.8.

Is Java version change considered as major upgrade?

[mpeddada1]

Is Java version change considered as major upgrade?

This java version change downgrades Java 11 to Java 8. We had to do this because using Java 11 causes the Kokoro Samples nightly job to fail with the following error:

[losalex]

I am not sure this is safe move considering that Java downgrade might impact customers using this library. Perhaps we can talk about it to get full understanding of the fix?

[mpeddada1]

I am not sure this is safe move considering that Java downgrade might impact customers using this library. Perhaps we can talk about it to get full understanding of the fix?

Oops sorry, didn't mean to edit your comment. For sure! we can discuss this further offline as well. Also adding reasoning for the change here to provide some context: It looks like all the samples in the repo use Java 8 for compilation since the Kokoro nightly jobs use that version to run the integration tests for the samples. This seems to be the only option at the moment until we upgrade the Java version on Kokoro. Open to hearing your thoughts on this.

[losalex]

Thanks!