Feature request: Allow running a custom target after configuring

### Brief Issue Summary

I use vscode for some QT Projekts, there require to run some tools to generate header / source files.

The problem is, that code indexers and other tools would ideally require those generated files. Also features like recompiling a source-file wont work because of missing generated files.

What needs to be done in my case:

``` bash
# configure
cmake -DCMAKE_GLOBAL_AUTOGEN_TARGET=ON
# post-configure
cmake --build . --target autogen
# only now many features will work correctly
```

I would like if I could configure a set of "post-configure" targets, like

``` json
"cmake.configurePostTarget": [
"autogen"
]
```

vscode should configure, then potentially check if the targets exists and start them or just try running them (failure is not fatal).

### CMake Tools Diagnostics

_No response_

### Debug Log

_No response_

### Additional Information

_No response_

Start by tracing the configure workflow and the handling of the proposed cmake.configurePostTarget setting. Check how CMake build targets are invoked, using autogen as the example, and determine where a missing target or failed post-configure command should be tolerated. Done means configured targets are attempted after configuration without making configuration failure fatal.

Written by the indexing model from the issue text.