Merge together MultiplatformHighlighting and MultiplatformAnalysis tests

Basically, the former uses an old quickly-scrapped infrastructure,
which were not applicable for HMPP, so  the latter tests were written.

So, both check for one and the same thing (highlighting in MPP projects),
but MultiplatformAnalysisTest is more modern,
and has a lot of inconvenient stuff in MultiplatformHighlighting fixed
^KT-43116 Fixed

idea/testData/multiplatform/callableReferences/common-2/common-2.kt

@@ -2,12 +2,12 @@
 
 package sample
 
-expect interface C {
-    fun common_2_C()
+expect interface <!LINE_MARKER("descr='Is subclassed by A [common-2] B [jvm]'"), LINE_MARKER("descr='Has actuals in JVM'")!>C<!> {
+    fun <!LINE_MARKER("descr='Has actuals in JVM'")!>common_2_C<!>()
 }
 
-actual interface A : C {
-    actual fun common_1_A()
+actual interface <!LINE_MARKER("descr='Is implemented by B [jvm]'"), LINE_MARKER("descr='Has declaration in common module'")!>A<!> : C {
+    actual fun <!LINE_MARKER("descr='Has declaration in common module'")!>common_1_A<!>()
     fun common_2_A()
 }