Only install the MBT plugin if gRPC is installed

Author: sameagen-MW

CMakeLists.txt

@@ -635,13 +635,13 @@ install(DIRECTORY ${METRICS_SDK_MATLAB_SOURCES} DESTINATION .)
 install(DIRECTORY ${LOGS_SDK_MATLAB_SOURCES} DESTINATION .)
 install(DIRECTORY ${COMMON_SDK_MATLAB_SOURCES} DESTINATION .)
 install(DIRECTORY ${AUTO_INSTRUMENTATION_MATLAB_SOURCES} DESTINATION .)
-install(DIRECTORY ${INSTRUMENTATION_MBT_MATLAB_SOURCES} DESTINATION .)
 install(FILES ${EXPORTER_MATLAB_SOURCES} DESTINATION ${OTLP_EXPORTERS_DIR})
 if(WITH_OTLP_HTTP)
     install(FILES ${OTLP_HTTP_EXPORTER_MATLAB_SOURCES} DESTINATION ${OTLP_EXPORTERS_DIR})
 endif()
 if(WITH_OTLP_GRPC)
     install(FILES ${OTLP_GRPC_EXPORTER_MATLAB_SOURCES} DESTINATION ${OTLP_EXPORTERS_DIR})
+    install(DIRECTORY ${INSTRUMENTATION_MBT_MATLAB_SOURCES} DESTINATION .)
 endif()
 if(WITH_OTLP_FILE)
     install(FILES ${OTLP_FILE_EXPORTER_MATLAB_SOURCES} DESTINATION ${OTLP_EXPORTERS_DIR})