Write AWS IAM kubeconfig file for workload cluster

[mitalipaygude]

Issue #, if available:

Description of changes:
Write AWS IAM kubeconfig file for workload cluster

Testing (if applicable):

• manual tested e2e

Documentation added/planned (if applicable):

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov]

Codecov Report

Attention: 76 lines in your changes are missing coverage. Please review.

Comparison is base (4583834) 73.48% compared to head (2dcb30e) 73.55%.
Report is 69 commits behind head on main.

Files	Patch %	Lines
controllers/kubeadmcontrolplane_controller.go	64.00%	5 Missing and 4 partials ⚠️
controllers/machinedeployment_controller.go	52.63%	5 Missing and 4 partials ⚠️
pkg/workflows/workload/writeclusterconfig.go	0.00%	5 Missing and 1 partial ⚠️
pkg/providers/tinkerbell/validate.go	73.68%	4 Missing and 1 partial ⚠️
pkg/providers/vsphere/vsphere.go	0.00%	5 Missing ⚠️
pkg/clustermanager/cluster_manager.go	78.94%	4 Missing ⚠️
pkg/providers/snow/snow.go	0.00%	4 Missing ⚠️
release/api/v1alpha1/artifacts.go	0.00%	4 Missing ⚠️
pkg/providers/docker/docker.go	0.00%	3 Missing ⚠️
pkg/workflows/management/create_workload.go	78.57%	2 Missing and 1 partial ⚠️
... and 15 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7596      +/-   ##
==========================================
+ Coverage   73.48%   73.55%   +0.06%     
==========================================
  Files         579      580       +1     
  Lines       36357    36643     +286     
==========================================
+ Hits        26718    26951     +233     
- Misses       7875     7916      +41     
- Partials     1764     1776      +12     

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[rahulbabu95]

/lgtm

[abhay-krishna]

/lgtm
/approve

[eks-distro-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: abhay-krishna

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• OWNERS [abhay-krishna]

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