Adding a few more overrides that -Wsuggest-override caught but clang-tidy didn't

Status Job ID Name Coverage
  Git Update
failed #425526
nix
git-update

 
  Tests
skipped #425528
allowed to fail manual
tests-on-llvm-10
skipped #425529
nix
tests-on-llvm-11
skipped #425527
nix
tests-on-llvm-9
 
Name Stage Failure
failed
git-update Git Update There has been a timeout failure or the job got stuck. Check your timeout limits or try again
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