fix: Control gateway-api Listener with global.enableGatewayAPI in Helm

[hanxiantao]

Ⅰ. Describe what this PR did

1）higress-core 中 gateway-api 监听通过 helm 中 global.enableGatewayAPI 参数控制

2）默认关闭 istio 中的 gateway-api 处理

Ⅱ. Does this pull request fix one issue?

fixes #1456

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 43.52%. Comparing base (ef31e09) to head (d7d4f09).
Report is 176 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/ingress/config/ingress_config.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1461      +/-   ##
==========================================
+ Coverage   35.91%   43.52%   +7.61%     
==========================================
  Files          69       76       +7     
  Lines       11576    12320     +744     
==========================================
+ Hits         4157     5362    +1205     
+ Misses       7104     6622     -482     
- Partials      315      336      +21     

Files with missing lines	Coverage Δ
pkg/ingress/config/ingress_config.go	12.97% <0.00%> (-0.90%)	⬇️

... and 68 files with indirect coverage changes

[CH3CHO]

LGTM