Fix testdata after migrating to NewKotlinTypeCheckerImpl in OverrideResolver

- In kt10409 both 'pipe'-declarations contain error type.
NewKotlinTypeChecker in OverrideResolver considers error types as equal,
thus they are matched as bound declarations, thus 'IterablePipeline'
isn't considered to contain abstract member, thus no suggestion to add
abstract modifier.
Because initially test was covering purely technical issue of working
with error types, instead of removing it completely the additional
abstract member has been added

- in kt10808 we don't add explicit type anymore because
'noTypeInference' is false, because both expected type and actual type
are error-types, and KotlinIntroduceVariableHandler explicitly uses type
checker with 'errorTypesEqualToAnything=false'.
Also, this change might be ultimately seen as small improvement, because
if one extracts something with error type, they would certainly prefer
it to have a proper type as soon as errors are resolved (i.e. additional
code/imports written), rather than having a useless Any-type.

idea/testData/refactoring/introduceVariable/kt10808.kt.after

@@ -1,6 +1,6 @@
 fun main(args:Array<String>) {
     val old = pref.getString("", "")
     pref.edit().putString("", "").apply()
-    val instance: Any = LocalBroadcastManager.getInstance(this)
+    val instance = LocalBroadcastManager.getInstance(this)
     instance.sendBroadcast(Intent(""))
 }