GCC 11 throws some apparently false-positive warnings about unintialized state and string-op truncation when building the server codebase at higher optimization levels. In SERVER-60712 we added builders that enable these optimizations, but we set --disable-warnings-as-errors for the GCC builders to work around this issue. We need to remove that setting and understand whether these are true or false positives, and find a way to work around them so we can remove that flag on the affected builders.