Support Tilt deployment of multiple workload clusters of the same flavor

[Jont828]

What type of PR is this?

/kind feature

What this PR does / why we need it: This PR changes the Tilt deployment of flavors so that the cluster name will be appended with a random number. Previously, attempting to deploy the same flavor multiple times would cause a collision with the existing workload cluster, but now the same flavor can be deployed multiple times through Tilt.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #937

Special notes for your reviewer:

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

NONE

[k8s-ci-robot]

Hi @Jont828. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[CecileRobertMichon]

/ok-to-test

[shysank]

/lgtm
@Jont828 can you please squash the commits?

[mboersma]

/lgtm

I tested this locally, and it works as advertised. Should be good to merge after the commits are squashed.

[mboersma]

/lgtm

[CecileRobertMichon]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CecileRobertMichon

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [CecileRobertMichon]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment