Unable to set cookies attributes for keys without values

[arkodg]

Description:

Describe the issue.

The current API for setting cookie attributes in the consistent hashing configuration is a map[string]string

gateway/api/v1alpha1/loadbalancer_types.go

Line 112 in 5d3df77

Attributes map[string]string `json:"attributes,omitempty"`

The RFC https://datatracker.ietf.org/doc/html/rfc6265#section-4.1.1 as well as Envoy Proxy https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/route/v3/route_components.proto#config-route-v3-routeaction-hashpolicy-cookieattribute support an optional value , which is seen in well known attributes such as Secure and HttpOnly
https://datatracker.ietf.org/doc/html/rfc6265#section-5.2.6

There are a few ways to address this issue

1. Add a new field e.g. attributesList that supports optional values

or

2. Add first class fields for the well known cookie attributes such as Secure and HttpOnly

or

3. Breaking change to attributes field to support optional values

Relates to https://envoyproxy.slack.com/archives/C03E6NHLESV/p1730397571965609

[arkodg]

ptal @envoyproxy/gateway-maintainers