FR: ability to enable/disable specific connectors

[igpetrov]

Is your feature request related to a problem? Please describe.

There is a need to have an ability to turn on/off specific connectors in given runtime.

Describe the solution you'd like

Option 1: connectors block list. By default, all connectors are enabled. To disable, a user has to pass a flag to disable a connector.

Option 2: connectors allow list. By default, all connectors are enabled. To enable, a user has to pass a flag to disable a connector.

Similar to the PR, flags can be environment variables, e.g: CONNECTOR_HTTP_REST_ENABLED=true or similar.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

Following up from the architecture review session 17 (Aug. 29, 2023).

[bastiankoerber]

needs some discussion to define the solution.

[bastiankoerber]

will be part of https://github.com/camunda/product-hub/issues/1063