Fix implicitly deleted move constructors (#1954)

These were incorrect and exhibited as warnings on more recent versions of
clang (notably on Mac).

- Use pointers instead of references internally in GenericHID and *Drive
- Leave PIDBase, PIDController, and Resource non-moveable
- Remove the atomic from m_disabled in NidecBrushless
- Make Timer and Trigger copyable as well as moveable
- Implement custom move constructor/assignment for SendableChooserBase

Also comment out some unused variables that caused clang warnings.

wpilibc/src/main/native/include/frc/smartdashboard/SendableChooserBase.h

@@ -31,8 +31,8 @@ class SendableChooserBase : public Sendable,
   SendableChooserBase();
   ~SendableChooserBase() override = default;
 
-  SendableChooserBase(SendableChooserBase&&) = default;
-  SendableChooserBase& operator=(SendableChooserBase&&) = default;
+  SendableChooserBase(SendableChooserBase&& oth);
+  SendableChooserBase& operator=(SendableChooserBase&& oth);
 
  protected:
   static constexpr const char* kDefault = "default";