[Backend] Reorganize version 1.0 codegen tests

- Extract all backend codegen tests that specifically target behaviour
  in to-be-deprecated functionality from language versions < 1.3"
- Remove those tests from the JVM IR test suite.

compiler/testData/codegen/box/ieee754/oldLanguageVersions/when10.kt

@@ -1,7 +1,6 @@
 // !LANGUAGE: -ProperIeee754Comparisons
 // !API_VERSION: 1.0
 // IGNORE_BACKEND: NATIVE
-// IGNORE_BACKEND: JVM_IR
 // DONT_TARGET_EXACT_BACKEND: JS_IR
 
 fun box(): String {

compiler/testData/codegen/box/ieee754/when10_properIeeeComparisons.kt

@@ -1,34 +0,0 @@
-// !LANGUAGE: +ProperIeee754Comparisons
-
-fun box(): String {
-    val plusZero: Any = 0.0
-    val minusZero: Any = -0.0
-    val nullDouble: Double? = null
-    if (plusZero is Double) {
-        when (plusZero) {
-            nullDouble -> {
-                return "fail 1"
-            }
-            -0.0 -> {
-            }
-            else -> {
-                return "fail 2"
-            }
-        }
-
-        if (minusZero is Double) {
-            when (plusZero) {
-                nullDouble -> {
-                    return "fail 3"
-                }
-                minusZero -> {
-                }
-                else -> {
-                    return "fail 4"
-                }
-            }
-        }
-    }
-
-    return "OK"
-}

compiler/testData/codegen/bytecodeText/ieee754/oldLanguageVersions/nullableDoubleEquals10.kt

@@ -1,5 +1,4 @@
 // !API_VERSION: 1.0
-// IGNORE_BACKEND: JVM_IR
 
 fun myEquals(a: Double?, b: Double?) = a == b
 

compiler/testData/codegen/bytecodeText/ieee754/oldLanguageVersions/nullableDoubleNotEquals10.kt

@@ -1,5 +1,4 @@
 // !API_VERSION: 1.0
-// IGNORE_BACKEND: JVM_IR
 
 fun myNotEquals(a: Double?, b: Double?) = a != b
 

compiler/testData/codegen/bytecodeText/ieee754/oldLanguageVersions/nullableFloatEquals10.kt

@@ -1,5 +1,4 @@
 // !API_VERSION: 1.0
-// IGNORE_BACKEND: JVM_IR
 
 fun myEquals(a: Float?, b: Float?) = a == b
 

compiler/testData/codegen/bytecodeText/ieee754/oldLanguageVersions/nullableFloatNotEquals10.kt

@@ -1,5 +1,4 @@
 // !API_VERSION: 1.0
-// IGNORE_BACKEND: JVM_IR
 
 fun myNotEquals(a: Float?, b: Float?) = a != b
 

compiler/testData/codegen/bytecodeText/ieee754/oldLanguageVersions/smartCastsForDouble10.kt

@@ -1,5 +1,4 @@
 // !API_VERSION: 1.0
-// IGNORE_BACKEND: JVM_IR
 
 fun equals5(a: Any?, b: Any?) = if (a is Double && b is Double?) a == b else null!!
 

compiler/testData/codegen/bytecodeText/ieee754/oldLanguageVersions/smartCastsForFloat10.kt

@@ -1,5 +1,4 @@
 // !API_VERSION: 1.0
-// IGNORE_BACKEND: JVM_IR
 
 fun equals5(a: Any?, b: Any?) = if (a is Float && b is Float?) a == b else null!!
 

compiler/testData/codegen/bytecodeText/ieee754/oldLanguageVersions/when10.kt

@@ -1,5 +1,4 @@
 // !API_VERSION: 1.0
-// IGNORE_BACKEND: JVM_IR
 
 fun box(): String {
     val plusZero: Any = 0.0

compiler/testData/codegen/bytecodeText/ieee754/oldLanguageVersions/whenNullableSmartCast10.kt

@@ -1,5 +1,4 @@
 // !API_VERSION: 1.0
-// IGNORE_BACKEND: JVM_IR
 
 fun box(): String {
     val nullValue: Any? = null