Should help with running tests on CI where some config dara set via the separate KConfig object seems to not arrive in the KSharedConfig instance in time, making tests fail due to missing data.

Example: GdbTest::testEnvironmentSet()
The config data with the test environment profile settings VariableA & VariableB is stored via the config object as returned from TestLaunchConfiguration.
The internal logic to write the environment data to the gdb setup commands uses KSharedConfig::openConfig() to fetch all enviroment profile data (DebugSession::configInferior(...)).
For that to work though, the data would have needed to be sync'ed in time.

Using the global shared config object for the respective config file (here autodetected due to QString() parameters) avoids the sync issues. Having a separate config objects has no own purpose for the tests.

Given I am pretty confident about this fix, and eager to see if this indeed solves the issues CI has with these tests, going to push now already, given availability of reviewers currently not that big,

Thanks!