Debug Test is massively slow - 40 secs waiting for promp & it always ask for a Debug Launch Configuration

### Brief Issue Summary

- Click on the Debug Test & Select my unit test.
- Starts build the test, even with "cmake.buildBeforeRun": false"?

- Takes ~30-40 secs to show the promp to select a Debug configuration.

It's not a Hello-world or simple project, but a production & enterprise one.
So:
- How could I speed this up?
- How can I avoid to select each time the same debug configuration from a list? Is not possible to let the Debug Test to choose the already selected option? This is really annoying.

Thanks.

### CMake Tools Diagnostics

```shell
Snippet with censored info (NDA/private company data)

[build] Generating changeset header for repo /home/mf/repos/PROJECT/
[build] [111/131] Automatic MOC for target whatever
[build] [112/129] Automatic MOC for target whatever
[build] [113/127] Automatic MOC for target whatever
[build] [114/125] Automatic MOC for target whatever
[build] [115/123] Automatic MOC for target whatever
[build] [116/121] Automatic MOC for target whatever
[build] [117/119] Automatic MOC for target whatever
[driver] Build completed: 00:00:03.953

After this, it shows [cmakefileapi-parser] Read reply folder: /home/borjamf/repos/asdasd/build/asdasd/Debug/.cmake/api/v1/reply
[cmakefileapi-parser] Found index files:

_No response_

Start from the Debug Test flow and the CMake Tools diagnostics around build completion, CMake file API parsing, and repeated CMakeCache.txt reads. Reproduce the long delay and repeated Debug Launch Configuration prompt, then verify that test debugging starts promptly and reuses the selected configuration.

Written by the indexing model from the issue text.