Added support to gateway-api package 1.6.0 version

[vdinesh4738]

Added support to gateway-api package 1.6.0 version:

1. Added "TCPRoute" under the standard api gateway under the "v1" stable api version.
2. Moved the "refernceGrants" under the standard api gateway under the "v1" stable api version.

Problems faced:

1. Platforms which manage the Gateway CRDs like OCP support 1.2.1 package version of the gateway-api while Alibaba cloud is on 1.4.1 and GKE Autopilot is on 1.4.1.

Thus we need to support and watch the "refernceGrants" GVK for both "v1beta" and "v1" based on CRD present in the platform.

2. Platforms which manage the Gateway CRDs under version 1.6.0, does not support TCPRoute and thus Consul API gateway is recommended if the user wants to use TCPRoute in this case.

Other changes

1. Updated UT cases and acceptance tcs.

[github-actions]

Go Test Coverage: 61.5%

Patch coverage: 41.7% (25/60 changed lines covered)

See the workflow run for the full per-package breakdown and downloadable HTML report.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 46.29630% with 29 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.59%. Comparing base (c721734) to head (400f352).

Files with missing lines	Patch %	Lines
...lane/api-gateway/controllers/gateway_controller.go	21.42%	22 Missing ⚠️
control-plane/helper/controller/controller.go	0.00%	4 Missing ⚠️
control-plane/api-gateway/binding/route_binding.go	90.00%	1 Missing ⚠️
control-plane/api-gateway/common/resources.go	50.00%	1 Missing ⚠️
control-plane/api-gateway/controllers/index.go	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5532      +/-   ##
==========================================
- Coverage   58.64%   58.59%   -0.06%     
==========================================
  Files         298      298              
  Lines       36767    36784      +17     
==========================================
- Hits        21562    21553       -9     
- Misses      13261    13286      +25     
- Partials     1944     1945       +1     

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