[gpctl] Show application cluster in gpctl clusters list output

[andrew-farries]

Description

Context

As part of #9198 we want to start syncing the `d_b_workspace_cluster` table with `db-sync`.

Currently, the table differs between US and EU regions because each table contains only the data relevant to that region. For example, in the EU table, the eu70 workspace cluster is marked as available and the us70 cluster is cordoned. In the US cluster eu70 is cordoned and us70 is available.

In order to sync the table we need to get to a point where there is no difference in the data in the table between EU and US regions.

To do that we will introduce a new field in the table called applicationCluster which records the name of the application cluster to which the record belongs. Thus, for each workspace cluster there will be two rows in Gitpod SaaS:

name	applicationCluster	url	tls	state	...
eu70	eu02	url	tls info	available	...
eu70	us02	url	tls info	cordoned	...

Effectively the new applicationCluster column gives the table an extra dimension so that we can combine both tables (EU and US) into one.

#13722 added the column to the table and made gpctl fill the value when gpctl registering a new workspace cluster. The value is taken from the GITPOD_INSTALLATION_SHORTNAME environment variable in ws-manager-bridge.

Add the application cluster for the workspace cluster to the output of gpctl clusters list:

The List RPC was extended in #13940 to add the extra application_cluster field in the response message.

Related Issue(s)

Part of #9198 and #13800

How to test

Release Notes

NONE

Documentation

Werft options:

• /werft with-local-preview
  If enabled this will build install/preview
• /werft with-preview
• /werft with-integration-tests=all
  Valid options are all, workspace, webapp, ide

[jenting]

Is the application cluster output like eu71 or us71?

[andrew-farries]

Is the application cluster output like eu71 or us71?

In the EU the application cluster is called eu02 and in the US it's us02.