[IR][tests] Update tests to reflect changes in partial linkage error messages

compiler/testData/klibABI/removeInlinedFunction/main/m.kt

@@ -1,12 +1,19 @@
 fun box(): String {
-    try {
-        return bar()
+    return try {
+        bar()
     } catch(e: Throwable) {
-        if (e.isLinkageError("/foo")) return "OK"
+        e.checkLinkageError("function foo can not be called")
     }
-
-    return "FAIL2"
 }
 
-private fun Throwable.isLinkageError(symbolName: String): Boolean =
-    this::class.simpleName == "IrLinkageError" && message?.startsWith("Unlinked IR symbol $symbolName|") == true
+private fun Throwable.checkLinkageError(prefix: String): String {
+    if (this::class.simpleName != "IrLinkageError") return "Unexpected throwable: ${this::class}"
+
+    val expectedMessagePrefix = "$prefix because it uses unlinked symbols"
+    val actualMessage = message.orEmpty()
+
+    return if (actualMessage.startsWith(expectedMessagePrefix))
+        "OK"
+    else
+        "EXPECTED: $expectedMessagePrefix, ACTUAL: $actualMessage"
+}