[wpiutil,wpimath] Add generic InterpolatingTreeMap (#5372)

wpiutil/src/main/java/edu/wpi/first/util/InterpolatingTreeMap.java

@@ -9,7 +9,10 @@ import java.util.TreeMap;
 /**
  * Interpolating Tree Maps are used to get values at points that are not defined by making a guess
  * from points that are defined. This uses linear interpolation.
+ *
+ * @deprecated Use {@link edu.wpi.first.math.interpolation.InterpolatingDoubleTreeMap} instead
  */
+@Deprecated(forRemoval = true, since = "2024")
 public class InterpolatingTreeMap<K extends Number, V extends Number> {
   private final TreeMap<K, V> m_map = new TreeMap<>();