[ARO-15333] remove fips from

[jonathan34c]

What this PR does

Per https://docs.google.com/document/d/1k6sqn7uFe46pnweQU_BPu07ux6U_gAiZPVYdGKKCKww/edit?tab=t.0#heading=h.7zb8p6a16n2r, remove ClusterSpec.FIPS
Remove ClusterSpec.fips - not required until August timeline

Jira: ARO-15333 - API Cleanup: Remove FIPS
Link to demo recording:

Special notes for your reviewer

[stevekuznetsov]

I can't access that Google doc. Could we please get in the habit of clearly explaining why we're making a change such as this in the Git commit message? It will auto-fill the GitHub PR description. I would like to know - what is the reason? Is it not possible to support this on Azure? Are we deferring this until a later point? When should we reconsider?

[mbarnes]

Revert changes to aks-cluster-base-bicep. Otherwise good to go.

Also thanks for dividing this into one field-removal per commit. It will make it easier to restore individual API fields in the future should we need to.

[mbarnes]

I can't access that Google doc. Could we please get in the habit of clearly explaining why we're making a change such as this in the Git commit message? It will auto-fill the GitHub PR description.

👍
@stevekuznetsov I asked @SudoBrendan to grant you access to the Google doc. These are outcomes from our recent internal ARM API review where it was decided to remove several cluster API fields, at least temporarily. This PR will be the first of several like it. Also I linked to the relevant JIRA story in the description, though it says the same as what Jonathan pasted.