controller: removes sink implementation #364
Merged
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Commit Message
This removes the config sink style implementation of controller. Previously, there the config sink was used as a central place to do the mutation that involves multiple resources. However, it unnecessarily comes with the complexity and this simplifies the implementation by removing it.
Majority of the changes are code moving, especially moving the resource mutation code from sink to under AIGatewayRoute controller.
This was brought up in the conversation with @sanposhiho and more follow up PRs will come to polish the implementation.