lldb-mi: Unable to start debugging when there are many dependencies

There is an issue in `lldb-mi`, it can't handle injection of environment variables in command line longer than 2048 characters. When there are many dependencies in the dependency graph of the conanfile, this threshold is quickly reached.

See https://github.com/microsoft/vscode-cpptools/issues/6874

Might be fixed by https://github.com/lldb-tools/lldb-mi/pull/87