[Tests] Add irText tests

compiler/testData/ir/irText/declarations/contextReceivers/plusMatrix.kt

@@ -0,0 +1,15 @@
+// !LANGUAGE: +ContextReceivers
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+interface NumberOperations {
+    fun Number.plus(other: Number): Number
+}
+
+class Matrix
+
+context(NumberOperations) fun Matrix.plus(other: Matrix): Matrix = TODO()
+
+fun NumberOperations.plusMatrix(m1: Matrix, m2: Matrix) {
+    m1.plus(m2)
+    m2.plus(m1)
+}