Support UTBotCpp original server

[PolyProgrammist]

• rpc Handshake(DummyRequest) returns(DummyResponse) {}
• rpc Heartbeat(DummyRequest) returns(HeartbeatResponse) {}
• rpc OpenLogChannel(LogChannelRequest) returns(stream LogEntry) {}
• rpc CloseLogChannel(DummyRequest) returns(DummyResponse) {}
• rpc OpenGTestChannel(LogChannelRequest) returns(stream LogEntry) {}
• rpc CloseGTestChannel(DummyRequest) returns(DummyResponse) {}
• rpc RegisterClient(RegisterClientRequest) returns(DummyResponse) {}
• rpc GetFunctionReturnType(FunctionRequest) returns(FunctionTypeResponse) {}
• rpc GenerateSnippetTests(SnippetRequest) returns(stream TestsResponse) {}
• rpc GenerateProjectTests(ProjectRequest) returns(stream TestsResponse) {}
• rpc GenerateFileTests(FileRequest) returns(stream TestsResponse) {}
• rpc GenerateFunctionTests(FunctionRequest) returns(stream TestsResponse) {}
• rpc GenerateClassTests(ClassRequest) returns(stream TestsResponse) {}
• rpc GenerateFolderTests(FolderRequest) returns(stream TestsResponse) {}
• rpc GenerateLineTests(LineRequest) returns(stream TestsResponse) {}
• rpc GenerateAssertionFailTests(AssertionRequest) returns(stream TestsResponse) {}
• rpc GeneratePredicateTests(PredicateRequest) returns(stream TestsResponse) {}
• rpc CreateTestsCoverageAndResult(CoverageAndResultsRequest) returns(stream CoverageAndResultsResponse) {}
• rpc GenerateProjectStubs(ProjectRequest) returns(stream StubsResponse) {}
• rpc PrintModulesContent(ProjectContext) returns(DummyResponse) {}
• rpc ConfigureProject(ProjectConfigRequest) returns(stream ProjectConfigResponse) {}
• rpc GetSourceCode(SourceInfo) returns(SourceCode) {}
• rpc GetProjectTargets(ProjectTargetsRequest) returns(ProjectTargetsResponse) {}
• rpc GetFileTargets(FileTargetsRequest) returns(FileTargetsResponse) {}