Bring back pebble expressions highlighting in no-code Editor fields

[anna-geller]

Feature description

Some no-code editor fields that users to have Monaco editor now lost their syntax highlighting - let's bring them back

Repro

id: myflow
namespace: company.team

inputs:
  - id: user
    type: STRING
    defaults: anna

tasks:
  - id: hello
    type: io.kestra.plugin.core.log.Log
    message: Hello "{{ inputs.user }}"