Provider agnostic gateway name/namespace

[adam-cattermole]

Changes

Builds on top of the authpolicy branch which should be merged first

• Renamed the gateway we deploy to kuadrant-ingressgateway for both istio and envoygateway
• Updated the namespace from istio-system/envoy-gateway-system to be gateway-system for both providers
• Updated the docs that refer to the gateway to point to this single gateway

Open to suggestions for the naming above, happy to change.

These changes makes it so that a user can follow the user-guides directly without amendment regardless of which gateway api provider they provision with (make local-setup GATEWAYAPI_PROVIDER=istio/make local-setup GATEWAYAPI_PROVIDER=envoygateway)

[codecov[bot]]

Codecov Report

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Additional details and impacted files

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[eguzki]

What about sticking to the gateway providers specific namespace names, i.e. istio-system and envoy-gateway-system and create a new namespace for the default ingress gateway in a provider agnostic namespacedname? Something like gateway-system/ingressgateway ?? I have the feeling that changing from istio-system to something else might raise issues

[maleck13]

@adam-cattermole we keeping this PR?

[adam-cattermole]

@maleck13 Yep, it's just a little out of date as it's based on the envoy gateway authpolicy branch which is yet to be merged