docs(sample): Add Native Image sample for Storage

[mpeddada1]

This PR copies over the Storage 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 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
If you write sample code, please follow the samples format.

[generated-files-bot]

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

• samples/pom.xml

[suztomo]

Checkstyle is failing.

[mpeddada1]

Checkstyle is failing.

Hm yeah, it looks it's happening in a couple of PRs and repos. We can wait until it is resolved.

[suztomo]

Run actions/setup-java@v[3](https://github.com/googleapis/java-storage/runs/5384705420?check_suite_focus=true#step:3:3)
  with:
    java-version: 8
    java-package: jdk
    architecture: x6[4](https://github.com/googleapis/java-storage/runs/5384705420?check_suite_focus=true#step:3:4)
    check-latest: false
    server-id: github
    server-username: GITHUB_ACTOR
    server-password: GITHUB_TOKEN
    overwrite-settings: true
    job-status: success
Error: Input required and not supplied: distribution

[suztomo]

#1286 should fix the checkstyle problem once it's merged.

[BenWhitehead]

Additionally, this is bad in that it leaves stdout like this after the tests finish running. So any thing else that might try to write to stdout would still go into memory.

[BenWhitehead]

LGTM, You might need to rebase to resolve the conflicts from owlbot in README.md. Feel free to merge once able.

[mpeddada1]

Thank you!