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/trimMarginPositive.kt

@@ -0,0 +1,38 @@
+// IGNORE_BACKEND: JVM_IR
+
+fun constant(): String {
+    return """
+        |Hello,
+        |World
+    """.trimMargin()
+}
+
+private const val HAS_MARGIN = """Hello,
+        |World"""
+fun interpolatedUsingConstant(): String {
+    return """
+        |Hello,
+        |$HAS_MARGIN
+        |World
+    """.trimMargin()
+}
+
+fun constantCustomPrefix(): String {
+    return """
+        ###Hello,
+        ###World
+    """.trimMargin(marginPrefix = "###")
+}
+
+private const val OCTOTHORPE = '#'
+fun constantCustomPrefixInterpolatedUsingConstant(): String {
+    return """
+        #@#Hello,
+        #@#World
+    """.trimMargin(marginPrefix = "$OCTOTHORPE@$OCTOTHORPE")
+}
+
+// 3 LDC "Hello,\\nWorld"
+// 1 LDC "Hello,\\nHello,\\nWorld\\nWorld"
+// 0 LDC "###"
+// 0 INVOKESTATIC kotlin/text/StringsKt.trimMargin