[BUG] Native build backend wipes out the expression content in verbose dialect

[igarashitm]

Describe the bug
While it's preserved with quarkus:dev, with native build, the expression content is wiped out with the /expression/simple/expression version of a dialect.

To Reproduce
Steps to reproduce the behavior:

1. Paste this YAML

- from:
    uri: "timer:trigger-gitter-streaming"
    parameters:
        repeatCount: 1
    steps:
        - log:
              message: Opening connection to Gitter...
        - setHeader:
              name: Authorization
              expression:
                  simple:
                      expression: "Bearer {{token}}"
        - to:
              uri: >-
                  [https://gitter.ems.host/_matrix/client/v3/sync?filter={](https://gitter.ems.host/_matrix/client/v3/sync?filter=%7B)"account_data":{"not_types":["*"]},"room":{"account_data":{"not_types":["*"]},"rooms":["{{room}}"],"timeline":{"limit":1,"types":["m.room.message"]},"state":{"not_types":["*"]}
                  } }
        - log:
              message: Gitter HTTP Streaming started

2. Click on 'Sync your code'
3. With native build the expression is wiped out, while it's preserved with quarkus:dev

quarkus:dev

2023-04-05_12-20-16.mp4

native

2023-04-05_12-11-17.mp4

Expected behavior
Native build should also preserve it

Logs
If applicable, add logs to help explain your problem.

Environment (please complete the following information):

• OS: [e.g. "Linux 5.10.0-9-amd64 Using sonarcloud action to add details on PR #1 SMP Debian 5.10.70-1 (2021-09-30) x86_64 GNU/Linux"]
• Output of the mvn -version` command
• Kaoto Version [e.g. 1.0]

Additional context
Add any other context about the problem here.