[JVM IR] Use JVM8 support for unsigned int operations

- unmute tests
- add test to ensure JVM target is respected
- add test to cover smart-casted cases
- implement function matching and replacement
- Switching on uint constants
- introduce lowering for standard library replacements

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedIntCompare_before.kt

@@ -0,0 +1,15 @@
+// WITH_RUNTIME
+
+val ua = 1234U
+val ub = 5678U
+
+fun box(): String {
+    if (ua.compareTo(ub) > 0) {
+        throw AssertionError()
+    }
+
+    return "OK"
+}
+
+// 1 kotlin/UnsignedKt.uintCompare
+// 0 INVOKESTATIC java/lang/Integer.compareUnsigned \(II\)I

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedIntCompare_jvm18.kt

@@ -1,7 +1,5 @@
 // JVM_TARGET: 1.8
 // WITH_RUNTIME
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36838 Use potentially intrinsified methods for unsigned available in JDK 1.8+ in JVM_IR
 
 val ua = 1234U
 val ub = 5678U

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedIntDivide_jvm18.kt

@@ -1,7 +1,5 @@
 // JVM_TARGET: 1.8
 // WITH_RUNTIME
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36838 Use potentially intrinsified methods for unsigned available in JDK 1.8+ in JVM_IR
 
 val ua = 1234U
 val ub = 5678U

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedIntRemainder_jvm18.kt

@@ -1,7 +1,5 @@
 // JVM_TARGET: 1.8
 // WITH_RUNTIME
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36838 Use potentially intrinsified methods for unsigned available in JDK 1.8+ in JVM_IR
 
 val ua = 1234U
 val ub = 5678U

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedIntSmartCasts_jvm18.kt

@@ -0,0 +1,7 @@
+// JVM_TARGET: 1.8
+// WITH_RUNTIME
+
+fun both(a: Any?, b: Any?) = if (a is UInt && b is UInt) a < b else null!!
+
+// 1 compareUnsigned
+// 0 uintCompare

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedIntToString_jvm18.kt

@@ -1,7 +1,5 @@
 // JVM_TARGET: 1.8
 // WITH_RUNTIME
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36838 Use potentially intrinsified methods for unsigned available in JDK 1.8+ in JVM_IR
 
 fun box(): String {
     val min = 0U.toString()

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedLongCompare_jvm18.kt

@@ -1,7 +1,5 @@
 // JVM_TARGET: 1.8
 // WITH_RUNTIME
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36838 Use potentially intrinsified methods for unsigned available in JDK 1.8+ in JVM_IR
 
 val ua = 1234UL
 val ub = 5678UL

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedLongDivide_jvm18.kt

@@ -1,7 +1,5 @@
 // JVM_TARGET: 1.8
 // WITH_RUNTIME
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36838 Use potentially intrinsified methods for unsigned available in JDK 1.8+ in JVM_IR
 
 val ua = 1234UL
 val ub = 5678UL

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedLongRemainder_jvm18.kt

@@ -1,7 +1,5 @@
 // JVM_TARGET: 1.8
 // WITH_RUNTIME
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36838 Use potentially intrinsified methods for unsigned available in JDK 1.8+ in JVM_IR
 
 val ua = 1234UL
 val ub = 5678UL

compiler/testData/codegen/bytecodeText/unsignedTypes/unsignedLongToString_jvm18.kt

@@ -1,7 +1,5 @@
 // JVM_TARGET: 1.8
 // WITH_RUNTIME
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36838 Use potentially intrinsified methods for unsigned available in JDK 1.8+ in JVM_IR
 
 fun box(): String {
     val min = 0UL.toString()

compiler/testData/codegen/bytecodeText/unsignedTypes/whenByUnsigned.kt

@@ -1,6 +1,4 @@
 // WITH_RUNTIME
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36839 Generate 'when' with unsigned subject using TABLESWITCH/LOOKUPSWITCH in JVM_IR
 
 const val M1: UInt = 2147483648u