[build] Upgrade Gradle plugins (#8166)

I upgraded all plugins I could see except org.ysb33r.doxygen. 2.0 made
breaking changes, and I couldn't figure out how to migrate.

Most of the changes are for suppressing new linter purification rites.

wpimath/src/main/java/edu/wpi/first/math/interpolation/Interpolatable.java

@@ -11,6 +11,7 @@ package edu.wpi.first.math.interpolation;
  *
  * @param <T> The class that is interpolatable.
  */
+@SuppressWarnings("PMD.ImplicitFunctionalInterface")
 public interface Interpolatable<T> {
   /**
    * Return the interpolated value. This object is assumed to be the starting position, or lower

wpimath/src/main/java/edu/wpi/first/math/spline/SplineHelper.java

@@ -226,7 +226,7 @@ public final class SplineHelper {
    * @param splines An array of un-optimized quintic splines.
    * @return An array of optimized quintic splines.
    */
-  @SuppressWarnings({"LocalVariableName", "PMD.AvoidInstantiatingObjectsInLoops"})
+  @SuppressWarnings("LocalVariableName")
   public static QuinticHermiteSpline[] optimizeCurvature(QuinticHermiteSpline[] splines) {
     // If there's only spline in the array, we can't optimize anything so just return that.
     if (splines.length < 2) {