rpk: add rpk registry mode command

[r-vasquez]

This PR adds the new rpk registry mode command

Fixes https://github.com/redpanda-data/devex/issues/29

Examples

Set a mode

$ rpk registry mode set foo bar --mode READWRITE        
SUBJECT  MODE      ERROR
foo      READWRITE  
bar      READWRITE  

Set the global mode

$ rpk registry mode set --mode READONLY 
SUBJECT   MODE      ERROR
{GLOBAL}  READONLY  

Get the mode of foo, bar, and the global mode

$ rpk registry mode get foo bar --global
SUBJECT   MODE       ERROR
foo       READWRITE
bar       READWRITE  
{GLOBAL}  READONLY  

All new commands include support for the --format flag.

Backports Required

• none - not a bug fix
• none - this is a backport
• none - issue does not exist in previous branches
• none - papercut/not impactful enough to backport
• v24.2.x
• v24.1.x
• v23.3.x

Release Notes

Features

• rpk: Add rpk registry mode to manage the schema registry mode.

[gene-redpanda]

LGTM

[r-vasquez]

Force Push:

• Add ?defaultToGlobal query param to the Get command
• Add reset test in ducktape

[vbotbuildovich]

ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/52337#01910b7e-409c-45f7-a0fb-ead6c27bde45

ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/52337#01910b80-8420-4ef6-9393-02037da2951c

ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/52370#01910f9b-111d-4e6e-a0f0-6fb1dd3d824b

[Deflaimun]

The global operation seems a bit error prune. The user might just forget to pass a subject and end up changing the mode globally without knowing.

Should we gate this behind a confirmation, or modify the global operation to work with a flag --global ?

[vbotbuildovich]

new failures in https://buildkite.com/redpanda/redpanda/builds/52370#01910f9b-111b-492f-affb-5f00f4b25ad3:

"rptest.tests.controller_snapshot_test.ControllerSnapshotPolicyTest.test_snapshotting_policy"

new failures in https://buildkite.com/redpanda/redpanda/builds/52370#01910f9b-1120-467b-8d3f-55b314274b1d:

"rptest.tests.e2e_iam_role_test.ShortLivedCredentialsTests.test_short_lived_credentials"

[vbotbuildovich]

/backport v24.2.x