Revert "Remove feature flag for controller via CLI (#7546)"

[mitalipaygude]

This reverts commit 1034e51.

Issue #, if available:

Description of changes:
Revert "Remove feature flag for controller via CLI (#7546)"
Testing (if applicable):

Documentation added/planned (if applicable):

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[abhinavmpandey08]

/lgtm
/approve

[eks-distro-bot]

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[codecov]

Codecov Report

Attention: 30 lines in your changes are missing coverage. Please review.

Comparison is base (4583834) 73.48% compared to head (22481c1) 73.55%.
Report is 36 commits behind head on main.

Files	Patch %	Lines
pkg/workflows/management/create_workload.go	0.00%	5 Missing and 1 partial ⚠️
pkg/providers/tinkerbell/validate.go	73.68%	4 Missing and 1 partial ⚠️
release/api/v1alpha1/artifacts.go	0.00%	4 Missing ⚠️
pkg/workflows/management/secrets.go	80.00%	3 Missing ⚠️
pkg/clustermanager/cluster_manager.go	88.23%	2 Missing ⚠️
pkg/providers/nutanix/controlplane.go	92.00%	1 Missing and 1 partial ⚠️
pkg/workflows/workload/create_gitops.go	84.61%	2 Missing ⚠️
pkg/workflows/workload/post_delete.go	84.61%	2 Missing ⚠️
cmd/eksctl-anywhere/cmd/deletecluster.go	0.00%	1 Missing ⚠️
cmd/eksctl-anywhere/cmd/validations.go	0.00%	1 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7554      +/-   ##
==========================================
+ Coverage   73.48%   73.55%   +0.06%     
==========================================
  Files         579      580       +1     
  Lines       36357    36496     +139     
==========================================
+ Hits        26718    26843     +125     
- Misses       7875     7889      +14     
  Partials     1764     1764              

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