Support ${...} for TestElement.enabled property

### Use case

It might be helpful to disable some of the bits in the test plan when launching the script from the commandline.

For instance:
* Exclude some of the thread groups
* Exclude some of the listeners (e.g. saving the responses)

### Possible solution

Move `enabled` checkbox to the common UI side by side with `name`, `comments`.

### Possible workarounds

_No response_

### JMeter Version

5.5

### Java Version

_No response_

### OS Version

_No response_

Start by tracing the TestElement.enabled property and the common UI fields named in the proposal, then inspect the command-line launch path for property expansion. Done means a command-line ${...} value can control enabled test-plan elements, with the proposed UI placement resolved consistently for thread groups and listeners.

Written by the indexing model from the issue text.