Enable log macros to work with no args (#4475)

This is enabled by the C++20 __VA_OPT__ feature.
Uses of "{}" format string were updated.
Some warning suppressions were required for older clang versions.
Also improve codegen of wpi::Logger::Log(), frc::ReportError(), and frc::MakeError();
these generate better and less redundant code if they use fmt::string_view for the
format string instead of templating on it.

wpilibc/src/main/native/cpp/AnalogTriggerOutput.cpp

@@ -18,7 +18,7 @@ bool AnalogTriggerOutput::Get() const {
   bool result = HAL_GetAnalogTriggerOutput(
       m_trigger->m_trigger, static_cast<HAL_AnalogTriggerType>(m_outputType),
       &status);
-  FRC_CheckErrorStatus(status, "{}", "Get");
+  FRC_CheckErrorStatus(status, "Get");
   return result;
 }