[Console] SQL highlighting breaks for routes other than _sql

[jloleysens]

Kibana version:

Current master (9e07a427c7)

Describe the bug:

For routes like _sql/translate syntax highlighting is broken

Screenshots

[elasticmachine]

Pinging @elastic/es-ui (Team:Elasticsearch UI)

[jloleysens]

Text version:

#Translate shows how we used a Elasticsearch nested query to join the products to the parent document
POST _sql/translate
{
  "query":"SELECT billing_last_name, billing_first_name, products.price, products.product_id FROM orders WHERE order_id=519894"
}