Add gcmConsentTypes to GraphQL schema and resolvers

Expose gcmConsentTypes on CookieCategory type and accept
it in UpdateCookieCategoryInput so the console can read
and write GCM consent type mappings per category.

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/server/api/console/v1/graphql/cookie_banner.graphql

@@ -123,6 +123,7 @@ type CookieCategory implements Node {
     description: String!
     kind: CookieCategoryKind!
     rank: Int!
+    gcmConsentTypes: [String!]!
 
     cookies(
         first: Int
@@ -308,6 +309,7 @@ input UpdateCookieCategoryInput {
     name: String
     slug: String
     description: String
+    gcmConsentTypes: [String!]
 }
 
 input DeleteCookieCategoryInput {