[PowerAssert] Correctly align infix calls with string const receivers

^KT-65640 Fixed

plugins/power-assert/power-assert.backend/src/org/jetbrains/kotlin/powerassert/diagram/IrDiagram.kt

@@ -192,7 +192,6 @@ private fun memberAccessOffset(
             ?: return 0
         val expressionInfo = sourceFile.getSourceRangeInfo(expression)
         var offset = receiver.endOffset - expressionInfo.startOffset + 1
-        if (receiver is IrConst<*> && receiver.kind == IrConstKind.String) offset++ // String constants don't include the quote
         if (offset < 0 || offset >= source.length) return 0 // infix function called using non-infix syntax
 
         // Continue until there is a non-whitespace character

plugins/power-assert/testData/codegen/infix/RegexFunction.kt

@@ -1,7 +1,3 @@
-// IGNORE_BACKEND_K1: JVM_IR
-// IGNORE_BACKEND_K2: JVM_IR
-// Disabled because of KT-65640
-
 fun box() = expectThrowableMessage {
     assert("Hello, World".matches("[A-Za-z]+".toRegex()))
 }

plugins/power-assert/testData/codegen/infix/RegexInfix.kt

@@ -1,7 +1,3 @@
-// IGNORE_BACKEND_K1: JVM_IR
-// IGNORE_BACKEND_K2: JVM_IR
-// Disabled because of KT-65640
-
 fun box() = expectThrowableMessage {
     assert("Hello, World" matches "[A-Za-z]+".toRegex())
 }