Add functionality to create RepositoryServer CR using kanctl command line

[r4rajat]

Change Overview

Add functionality to create RepositoryServer CR using kanctl command line tool.
Like Profile, RepositoryServer could also be created using kanctl create repository-server

Pull request type

Please check the type of change your PR introduces:

• 🚧 Work in Progress
• 🌈 Refactoring (no functional changes, no api changes)
• 🐹 Trivial/Minor
• 🐛 Bugfix
• 🌻 Feature
• 🗺️ Documentation
• 🤖 Test

Issues

• fixes #issue-number

Test Plan

• 💪 Manual
• ⚡ Unit test
• 💚 E2E

Testing

1) Build kanctl

go build -o kanctl cmd/kanctl/main.go

2) Create Repository Server using kanctl

• Without --wait flag

./kanctl create repository-server \
--prefix /repo-controller/ \
--user kanisteruser --user-access-secret repository-server-user-access \
--kopia-repository-user kanisteradmin --admin-user-access-secret repository-admin-user \
--tls-secret repository-server-tls-cert --kopia-repository-password-secret repo-pass \
--location-secret s3-location --location-creds-secret s3-creds --namespace kanister

repository-server 'kopia-repo-server-nzc5f' created

• With --wait flag (Repository Server gets ready)

./kanctl create repository-server \
--prefix /repo-controller/ \
--user kanisteruser --user-access-secret repository-server-user-access \
--kopia-repository-user kanisteradmin --admin-user-access-secret repository-admin-user \
--tls-secret repository-server-tls-cert --kopia-repository-password-secret repo-pass \
--location-secret s3-location --location-creds-secret s3-creds --namespace kanister --wait

Waiting for the kopia repository server CR to be in ready state...
repositoryservers.cr.kanister.io/kopia-repo-server-2hdlz created

• With --wait flag (Repository Server doesn't gets ready)

./kanctl create repository-server \
--prefix /repo-controller/ \
--user kanisteruser --user-access-secret repository-server-user-access \
--kopia-repository-user kanisteradmin --admin-user-access-secret repository-admin-user \
--tls-secret repository-server-tls-cert --kopia-repository-password-secret repo-pass \
--location-secret s3-location --location-creds-secret s3-creds --namespace kanister --wait

repositoryservers.cr.kanister.io/kopia-repo-server-ch2vx created
Waiting for the kopia repository server CR to be in ready state...
Error: Repository Server is not ready.
Current Status: ServerStopped
Reason: Failed to connect to Kopia repository: Failed to connect to the backup repository: Access Denied: Failed to exec command in pod: command terminated with exit code 1
: Context done while polling: context deadline exceeded

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[kale-amruta]

please check the comments

[kale-amruta]

lgtm