feat: [SKU-modularization] Get SKU Handler

[smritidahal653]

Reason for Change:

• Reading the CLOUD_PROVIDER environment variable and initializing the respective SKUHandler to access the correct list of gpu skus

Requirements

• added unit tests and e2e tests (if applicable).

Issue Fixed:

Notes for Reviewers:
This PR does not change anything in the current implementation to keep things clean. The next PR will get rid of sku_config from v1alpha1 and carry out necessary refactoring and test updates.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.

Project coverage is 60.73%. Comparing base (ed546f0) to head (e7c80ab).
Report is 8 commits behind head on main.

Files	Patch %	Lines
pkg/sku/cloud_sku_handler.go	0.00%	8 Missing ⚠️
pkg/utils/common.go	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #518      +/-   ##
==========================================
- Coverage   61.10%   60.73%   -0.38%     
==========================================
  Files          29       30       +1     
  Lines        2602     2618      +16     
==========================================
  Hits         1590     1590              
- Misses        921      937      +16     
  Partials       91       91              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.