Adding katalon tool support for cloud builder

[ucguy4u]

This Pull Request adds support for using the Katalon tool in Google Cloud Build. It includes the following changes:

Dockerfile:

• A new Dockerfile is added that uses the Katalon 9.6.0 image.
• Installs necessary certificates and defines the entry point.

cloudbuild.yaml:

• The Cloud Build configuration (cloudbuild.yaml) has been updated to support building and pushing Docker images tagged with both latest and 9.6.0.

README.md:

• The README.md file provides documentation on how to use Katalon in Google Cloud Build, including steps for triggering the build locally with gcloud builds submit.
• These updates make it easier to integrate Katalon into a CI/CD pipeline using Google Cloud Build.

[google-cla]

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[ucguy4u]

@rphillips @bfolkens @matti @tmc
can u please review the PR. Let me know if you need more information. Help me to get this merge as this is my first time.

[haroonc]

@ucguy4u How is this image different from the official image katalonstudio/katalon? Adding this image to community builders does not seem to add much value?

[ucguy4u]

@ucguy4u How is this image different from the official image katalonstudio/katalon? Adding this image to community builders does not seem to add much value?

The image we're using here includes additional tools like Google Cloud SDK, kubectl, and the gke-gcloud-auth-plugin that are not present in the official katalonstudio/katalon image. This customization allows us to integrate Katalon testing with cloud environments such as GKE, and manage resources directly from within the same container.

By including these dependencies, we streamline the CI/CD process for users who need to interact with cloud platforms like GCP while running their Katalon tests, making it more versatile for cloud-based workflows.