[Task]: Add go Context.context to NeedsMoreRequestData function

Please select the area the issue is related to

Area/Gateway (Routing, API deployment in gateway etc.)

Please select the aspect the issue is related to

Aspect/API (API backends, definitions, contracts, interfaces, OpenAPI)

Description

The existing function

type StreamingRequestPolicy interface {
	RequestPolicy
	OnRequestBodyChunk(ctx context.Context, reqCtx *RequestStreamContext, chunk *StreamBody, params map[string]interface{}) StreamingRequestAction
	NeedsMoreRequestData(accumulated []byte) bool
}

Proposed one.

type StreamingRequestPolicy interface {
	RequestPolicy
	OnRequestBodyChunk(ctx context.Context, reqCtx *RequestStreamContext, chunk *StreamBody, params map[string]interface{}) StreamingRequestAction
	NeedsMoreRequestData(ctx context.Context, reqCtx *RequestStreamContext, chunk *StreamBody, params map[string]interface{}) bool
}

This is a breaking change; older policies won't work in the new gateway, and new policies won't work on GW v1.0.0

Search for StreamingRequestPolicy and all uses of NeedsMoreRequestData to map the interface, implementations, and gateway callers. Review how the current accumulated request data is passed, then update the affected contract consistently with the proposed context, request context, chunk, and params arguments. Done means the gateway builds with the new interface and the documented breaking compatibility is accounted for.