Implement support for custom build script inside CI Action on Github #451

Currently there are two ways to extract the compilation and linking information from the project

• automatic, if the project has CMakeList.txt
• manual, if the project has any other build procedure.

Let implement the thirds automatic way, if the the project has the utbot_build.sh script in the project root.
The utbot_build.sh script is implemented by author of the project and build the project into the build project folder.
Here the build project folder is the folder that is mentioned as a build folder in the UTBotCpp wizard setup.

Then the procedure of UTBotCpp configuration is following:

• UTBotCpp creates the build folder at the configuration stage as it made it earlier
• UTBotCpp is looking for the utbot_build.sh script at the project root and if does not exists, returns to fallback scenario
• If the utbot_build.sh script exists, UTBotCpp creates the wrapper script utbot_configure.sh in the build folder with the context

    #!/bin/bash
    # This file is automatically generated by UnitTestBot. For further information see https://unittestbot.org

    cd ..
    ./utbot_build.sh

The wrapper need for the run of bear configurator from the build folder.