Clean up unit UDL usage

[calcmogul]

No description provided.

[KangarooKoala]

A few more spots that might be worth hitting in this PR as well:

wpilibc/src/main/native/cppcs/RobotBase.cpp:143:    return units::second_t{wpi::Now() * 1.0e-6};
wpilibc/src/main/native/include/frc/LEDPattern.h:111:   * particular LED strip units::meter_t LED_SPACING = units::meter_t{1 /60.0};
wpilibc/src/main/native/include/frc/LEDPattern.h:115:   *     rainbow.ScrollAtAbsoluteSpeed(units::inches_per_second_t{4},
wpilibc/src/main/native/include/frc/DMASample.h:64:    return units::second_t{static_cast<double>(GetTime()) * 1.0e-6};
wpilibc/src/main/native/cpp/PneumaticsControlModule.cpp:267:  return units::volt_t{0};
wpilibc/src/main/native/cpp/ADIS16470_IMU.cpp:821:  return units::degree_t{0.0};
wpilibc/src/main/native/cpp/counter/Tachometer.cpp:48:    return units::hertz_t{0.0};
wpilibc/src/main/native/cpp/counter/Tachometer.cpp:70:    return units::turns_per_second_t{0.0};
wpilibc/src/main/native/cpp/counter/Tachometer.cpp:74:    return units::turns_per_second_t{0.0};
wpilibc/src/main/native/cpp/counter/Tachometer.cpp:77:  return units::turns_per_second_t{rotationHz.value()};
wpimath/src/test/native/cpp/kinematics/MecanumDriveKinematicsTest.cpp:83:                       units::radians_per_second_t{2 * std::numbers::pi}};
wpimath/src/test/native/cpp/kinematics/SwerveDriveKinematicsTest.cpp:99:                       units::radians_per_second_t{2 * std::numbers::pi}};
wpimath/src/test/native/cpp/kinematics/SwerveDriveKinematicsTest.cpp:115:                       units::radians_per_second_t{2 * std::numbers::pi}};
wpimath/src/test/native/cpp/kinematics/SwerveDriveKinematicsTest.cpp:177:                       units::radians_per_second_t{2 * std::numbers::pi}};
wpimath/src/test/native/cpp/system/plant/proto/DCMotorProtoTest.cpp:16:const DCMotor kExpectedData = DCMotor{units::volt_t{1.91},
wpimath/src/test/native/cpp/system/plant/proto/DCMotorProtoTest.cpp:17:                                      units::newton_meter_t{19.1},
wpimath/src/test/native/cpp/system/plant/proto/DCMotorProtoTest.cpp:18:                                      units::ampere_t{1.74},
wpimath/src/test/native/cpp/system/plant/proto/DCMotorProtoTest.cpp:19:                                      units::ampere_t{2.29},
wpimath/src/test/native/cpp/system/plant/proto/DCMotorProtoTest.cpp:20:                                      units::radians_per_second_t{2.2},
wpimath/src/test/native/cpp/system/plant/struct/DCMotorStructTest.cpp:14:const DCMotor kExpectedData = DCMotor{units::volt_t{1.91},
wpimath/src/test/native/cpp/system/plant/struct/DCMotorStructTest.cpp:15:                                      units::newton_meter_t{19.1},
wpimath/src/test/native/cpp/system/plant/struct/DCMotorStructTest.cpp:16:                                      units::ampere_t{1.74},
wpimath/src/test/native/cpp/system/plant/struct/DCMotorStructTest.cpp:17:                                      units::ampere_t{2.29},
wpimath/src/test/native/cpp/system/plant/struct/DCMotorStructTest.cpp:18:                                      units::radians_per_second_t{2.2},