EVEREST-574 Merge namespaces for cluster role binding

[gen1us2k]

CHANGE DESCRIPTION

Problem: EVEREST-574

Short explanation of the problem.

Right now when the user runs the provisioning command multiple times using multiple namespaces the previous deployments of the everest stop working because clusterrolebinding overrides with the latest namespace.

The PR fixes the following problems

1. Support for deploying everest into multiple namespaces inside one k8s cluster using the same service account
2. Migrated for the new API design after the redesign
3. Do not install everest if it's already installed to prevent overriding of user's changes
4. Dropped multi k8s support from the CLI

CHECKLIST

Jira

• [x] Is the Jira ticket created and referenced properly?

Tests

• [x] Is an Integration test/test case added for the new feature/change?
• [ ] Are unit tests added where appropriate?

[codecov-commenter]

Codecov Report

Attention: 47 lines in your changes are missing coverage. Please review.

Comparison is base (055f364) 5.38% compared to head (d832e66) 5.32%.

Files	Patch %	Lines
pkg/kubernetes/client/client.go	0.00%	32 Missing :warning:
pkg/install/install.go	0.00%	15 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #214 +/- ## ======================================== - Coverage 5.38% 5.32% -0.06% ======================================== Files 13 13 Lines 2805 2835 +30 ======================================== Hits 151 151 - Misses 2627 2657 +30 Partials 27 27 ```

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