TUN-6774: Validate OriginRequest.Access to add Ingress.Middleware

We take advantage of the JWTValidator middleware and attach it to an
ingress rule based on Access configurations. We attach the Validator
directly to the ingress rules because we want to take advantage of
caching and token revert/handling that comes with go-oidc.

ingress/middleware/jwtvalidator.go

@@ -42,8 +42,8 @@ func NewJWTValidator(teamName string, certsURL string, audTags []string) *JWTVal
 	}
 }
 
-func (v *JWTValidator) Handle(ctx context.Context, headers http.Header) error {
-	accessJWT := headers.Get(headerKeyAccessJWTAssertion)
+func (v *JWTValidator) Handle(ctx context.Context, r *http.Request) error {
+	accessJWT := r.Header.Get(headerKeyAccessJWTAssertion)
 	if accessJWT == "" {
 		return ErrNoAccessToken
 	}