Add intrinsics for compile-time computing trimMargin/trimIndent

These only apply when the receiver can be resolved to a constant and the margin prefix, if specified, is also a constant.

compiler/testData/codegen/bytecodeText/intrinsicsTrim/trimMarginNegative.kt

@@ -0,0 +1,33 @@
+fun notConstant(arg: String): String {
+    return arg.trimMargin()
+}
+
+fun notConstantCustomPrefix(arg: String): String {
+    return arg.trimMargin("###")
+}
+
+fun interpolated(arg: Int):String {
+    return """
+        |Hello,
+        |$arg
+    """.trimMargin()
+}
+
+fun notInvoked():String {
+    return """
+        |Hello,
+        |World
+    """
+}
+
+fun constantWithNonConstantCustomPrefix(arg: String): String {
+    return """
+        |Hello,
+        |World
+    """.trimMargin(arg)
+}
+
+// 1 LDC "\\n        \|Hello,\\n        \|"
+// 1 LDC "\\n    "
+// 2 LDC "\\n        \|Hello,\\n        \|World\\n    "
+// 4 INVOKESTATIC kotlin/text/StringsKt.trimMargin