rpk cloud namespace: create, list, delete

[r-vasquez]

This PR introduces the new rpk cloud namespace command.

It also introduces the first use of the publicapi proto files in rpk and the grpc client.

Authentication:

Every command under rpk cloud namespace triggers an authentication flow (either SSO or client credentials) if the user executing the command is not authenticated.

The flags -X cloud.client_id and -X cloud.client_secret are available if you want a client credential flow and avoid browser authentication.

Examples:

rpk cloud namespace list

$ rpk cloud namespace list 
NAME      ID
test-1    <namespace-id>
foo       <namespace-id>
bar       <namespace-id>

$ rpk cloud namespace create rogger-test
NAME         ID                                    ERROR
rogger-test  <namespace-id>

rpk cloud namespace delete rogger-test
? Confirm deletion of namespace "rogger-test" with ID "<namespace-id> "? Yes
NAME         ID
rogger-test  <namespace-id> 

# --no-confirm available

Every command has the --format json/yaml available.

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
• v23.3.x
• v23.2.x
• v23.1.x

Release Notes

Features

• You can create namespaces in Redpanda cloud using rpk cloud namespace.

[vbotbuildovich]

ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/45270#018dd3e2-005a-4589-8807-1ea95459d73e

ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/45270#018dd3e2-0060-4bea-97fa-7c6786d51bf9

[twmb]

why ToLower here?

[r-vasquez]

Without it, Go will sort the uppercase letter first.

data := []string{"A", "b", "D", "c"}
sort.Slice(data, func(i, j int) bool { return data[i] < data[j] })

Will return:

[A,D,b,c]

[twmb]

Yes but isn't that valid? I guess it's a matter of preference.
Also, are namespaces mixed case? I thought they were uuids formatted entirely lowercase.

[r-vasquez]

Yes, it is valid. But here I'm sorting the names; they can use upper case and special characters. During the development, I had a case where it was sorted like:

NAME                         ID
Nicola's Playground          [redacted]
alena's                      [redacted]
andrew-integration           [redacted]
...

So I just did a case insensitive sort here because it looked weird to me.

[r-vasquez]

/backport v23.3.x