Add way to suppress warning for missing submodule

We have a build that builds for Linux, Windows User Mode and Windows Kernel Mode. We have some submodules in our build, however to decrease build times, we only grab the necessary submodules for the specific build during CI. This causes many "The source code won't be available via Source Link" warnings to be popped up during the build, because only the needed submodules are actually cloned, and not all available to the repo. Is there a way to suppress these warnings, or if not would a feature to allow doing so be accepted?