Cancel reconfigure and restart it

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### Brief Issue Summary

We have a project where cmake configure takes quite some time to complete (magnitude of minutes)
In such a project, the automatic reconfigure when you change a CMakeLists.txt is causing quite a slowdown in the workflow.
The flow:
- Make a change: triggers the reconfigure
- Fix your type: reconfigure can't start until the previous one is fixed
- Wait until reconfigure is done
- Start the configuration again (happens automatically)
- Wait until configure is done

It would be nice if the previous cmake process (tree) can be canceled whenever a configure is requested. (Either implicitly by changing the CMakeLists.txt or explicitly pressing the "clear cache and configure")

### CMake Tools Diagnostics

```shell

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### Debug Log

```shell

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### Additional Information

_No response_

Start by tracing the automatic reconfigure request and the explicit “clear cache and configure” command to the active CMake process management. Ensure a pending configure cancels the previous CMake process tree before starting, and verify that both request paths avoid overlapping configure runs.

Written by the indexing model from the issue text.