Implement special desugaring for numeric comparisons in PSI2IR

This introduces the following IR built-in functions required for proper
implementation of the number comparisons:

- ieee754Equals(T, T): Boolean,
    for each T in {Float?, Double?}

- less(T, T): Boolean
  lessOrEqual(T, T): Boolean
  greater(T, T): Boolean
  greaterOrEqual(T, T): Boolean
    for each T in {Int, Long, Float, Double}

compiler/testData/ir/irText/expressions/floatingPointComparisons/comparableWithDoubleOrFloat.kt

@@ -0,0 +1,3 @@
+fun testD(x: Comparable<Double>, y: Comparable<Double>) = x is Double && y is Double && x < y
+
+fun testF(x: Comparable<Float>, y: Comparable<Float>) = x is Float && y is Float && x < y