Updates the name of the integration to Google Artifact Management

What does this MR do and why?

Based on #444825 (comment 1841658874), updates the name of the integration to Google Artifact Management

Rename frontend component name to google_artifact_management

Renamed doc file & updated links to point to new doc file.

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Before	After

How to set up and validate locally

1. Simulate a SAAS instance in local GDK

2. In rails console enable the experiment

   Feature.enable(:google_cloud_support_feature_flag)

3. Visit Project > Settings > Integrations > Google Cloud IAM and complete the fields with random values.

4. Visit Project > Settings > Integrations > Google Artifact Management

5. Make sure the links point to the right documentation

Related to #444825 (closed)