feat: disable kbcli addons in batch

[SuperAayush]

The PR contains the code to make the kbcli to disable more than one addon at once. I have not tested the code yet since I am not aware of how to setup kbcli locally for testing purposes and have tried reaching out to @shanshanying for the same.

I respect the busy schedule all the maintainers but would be helpful if I can get KT on how should once setup kbcli locally mainly for testing purposes so that I can make the PR for this issue as well: #278

I am aware that this PR still needs many changes hence I am opening this as a draft PR.

Fixes: #237

[shanshanying]

1. build with

make kbcli

and get follwing err msg, pls fix it first.

2. To test, just run

make test

More unit tests for addons should be added to pkg/cmd/addon/addon_test.go .

3. to play with your newly build kbcli binary
   a) you have to install KubeBlocks first: https://kubeblocks.io/docs/release-0.8/user_docs/installation/install-with-kbcli/install-kubeblocks-with-kbcli
   b) and you may get the list of addon using

 ./bin/kbcli addon list

[SuperAayush]

I have been trying to add a test for the disable command part. Have tried to debug using multiple cases but all of them throw the same error - The connection to the server localhost:8080 was refused - did you specify the right host or port?. I understand the error is saying that my code addition is trying to connect to a K8s existing cluster but it throws the same error even if I make a fake K8s client.

Here are the 3 different code changes I executed but got the same error:

1. https://gist.github.com/SuperAayush/c89a011d6e8c8acb6eeb1ff50818dc0b

2. https://gist.github.com/SuperAayush/7ba7838f6dec8138396728070dc47e35

3. https://gist.github.com/SuperAayush/7f6f7d63ba1b4f4f25b4d2e8e0c17c7c

I did also try to use clientfake instead of restfake but still no change in the error.

cc - @shanshanying

[shanshanying]

Reference
The error is raised at line
https://github.com/superaayush/kbcli/blob/improvement/kbcli-disable-addons-in-batch-issue237/pkg/cmd/addon/addon.go#L303

When addon cmd calls ServerVersion().
To solve this issue, you can refer to how client-go mock the test for this function at:
https://github.com/kubernetes/client-go/blob/1518fca9f06c6a73fc091535b8966c71704e657b/discovery/discovery_client_test.go#L48

Hope it will help.

[shanshanying]

/approve

[shanshanying]

resolve conflicts pls.

[ldming]

This import order does not need to be adjusted.

[SuperAayush]

Strange, I did not close the PR. No idea what happened here 🤔

[SuperAayush]

Going for a new PR

[SuperAayush]

Please head over to this PR: #313