IrBuiltins: refactoring for equality checks

Previously,
* Equals performs IEEE 754 equality check for floating points and
  byte-to-byte checks for other types, including references.
* Ieee754Equals performs IEEE 754 for primitive types
* TotalOrderEquals performs total order equals to all types, including
  floating points.

Now it is simplified,
* Equals performs total order checks for all types.
* Ieee754Equals performs IEEE 754 for primitive types.
* (TotalOrderEquals is removed.)

compiler/testData/codegen/box/dataClasses/floatParam.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
 // IGNORE_BACKEND: JS_IR
 // TODO: muted automatically, investigate should it be ran for JS or not
 // IGNORE_BACKEND: JS