clang-tidy: prepare to enable google-runtime-references
clang-tidy: prepare to enable google-runtime-references

benchmark::State will stay whitelisted...

darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed