Konnect entities: add official documentation how KGO can manage Konnect entities

[pmalek]

Problem statement

#370 introduces Konnect entity management in KGO. This task tracks the documentation effort for this.

Tasks

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1. KongRoute and KongService guide docs(kgo): add Konnect entities documentation docs.konghq.com#8084
2. KongConsumer and Credentials guide docs(kgo): add Konnect entities documentation docs.konghq.com#8084
3. KongKey and KeySet guide docs(kgo): add Konnect entities documentation docs.konghq.com#8084
4. KongPluginBinding guide KGO: add guide for kongpluginbinding docs.konghq.com#8049
5. KongUpstream and Target guide docs(kgo): add Konnect entities documentation docs.konghq.com#8084
6. Tagging and labeling entities guide docs(kgo): add Konnect entities documentation docs.konghq.com#8084
7. KongCertificate, CACertificate and SNI guide docs(kgo): add Konnect entities documentation docs.konghq.com#8084
8. KongVault guide docs(kgo): add Konnect entities documentation docs.konghq.com#8084
9. DataPlaneClientCertificate guide docs(kgo): add Konnect entities documentation docs.konghq.com#8084
10. Architecture reference docs(kgo): add Konnect entities documentation docs.konghq.com#8084

Acceptance criteria

• A guide at https://docs.konghq.com/gateway-operator/latest/ exists which explains users how they can use KGO to manage Konnect entities.
• Someone with less familiarity with the feature does e2e manual tests based on what is in the docs

[czeslavo]

I'm assigning this to myself - I'll try to bootstrap docs for Konnect entities.

[pmalek]

I'm working on the architecture reference page.

EDIT:

Added under Kong/docs.konghq.com#8084

https://deploy-preview-8084--kongdocs.netlify.app/gateway-operator/unreleased/guides/konnect-entities/architecture/

[pmalek]

I believe this is done now. The last AC to be fulfilled now is

Someone with less familiarity with the feature does e2e manual tests based on what is in the docs

which I believe will be solved once @rspurgeon or @mheap finish their testing.

[pmalek]

Closing as testing has been concluded.