Support for checking loaded descriptors agains an expected txt file

compiler/testData/lazyResolve/diagnostics/checkArguments/SpreadVarargs.txt

@@ -0,0 +1,7 @@
+namespace <root>
+
+internal final fun </*0*/ T : jet.Any?>array1(/*0*/ vararg a: T /*jet.Array<T>*/): jet.Array<T>
+internal final fun join(/*0*/ x: jet.Int, /*1*/ vararg a: jet.String /*jet.Array<jet.String>*/): jet.String
+internal final fun </*0*/ T : jet.Any?>joinG(/*0*/ x: jet.Int, /*1*/ vararg a: T /*jet.Array<T>*/): jet.String
+internal final fun </*0*/ T : jet.Any?>joinT(/*0*/ x: jet.Int, /*1*/ vararg a: T /*jet.Array<T>*/): T?
+internal final fun main(/*0*/ args: jet.Array<jet.String>): jet.Tuple0

compiler/testData/lazyResolve/diagnostics/checkArguments/kt1897_diagnostic_part.txt

@@ -0,0 +1,9 @@
+namespace <root>
+
+// <namespace name="a">
+namespace a
+
+internal final fun bar(): jet.Tuple0
+internal final fun foo(/*0*/ i: jet.Int, /*1*/ s: jet.String): jet.Tuple0
+internal final fun test(): jet.Tuple0
+// </namespace name="a">

compiler/testData/lazyResolve/diagnostics/checkArguments/kt1940.txt

@@ -0,0 +1,8 @@
+namespace <root>
+
+// <namespace name="kt1940">
+namespace kt1940
+
+internal final fun foo(/*0*/ i: jet.Int): jet.Tuple0
+internal final fun test(): jet.Tuple0
+// </namespace name="kt1940">