Add "expectedBy" to module descriptor and use it in checker

Now ExpectActualDeclarationChecker in IDE context
uses common module descriptors for relevant checks.
Compiler still uses own module instead (see comment in checker)
So #KT-21771 Fixed

idea/testData/multiModuleHighlighting/multiplatform/basic/jvm/jvm.kt

@@ -10,6 +10,6 @@ expect class Their {
 
 }
 
-actual class Their {
+actual class <error descr="[ACTUAL_WITHOUT_EXPECT] Actual class 'Their' has no corresponding expected declaration">Their</error> {
 
 }

idea/testData/multiModuleHighlighting/multiplatform/depends/common/common.kt

@@ -0,0 +1 @@
+expect class My

idea/testData/multiModuleHighlighting/multiplatform/depends/jvm/jvm.kt

@@ -0,0 +1 @@
+class <error descr="[ACTUAL_MISSING] Declaration must be marked with 'actual'">My</error>

idea/testData/multiModuleHighlighting/multiplatform/triangle/common_base/My.kt

@@ -0,0 +1 @@
+expect class My

idea/testData/multiModuleHighlighting/multiplatform/triangle/common_derived/foo.kt

@@ -0,0 +1 @@
+expect fun foo(my: Any)

idea/testData/multiModuleHighlighting/multiplatform/triangle/jvm_derived/impl.kt

@@ -0,0 +1,3 @@
+class My
+
+actual fun foo(my: Any) {}

idea/testData/multiModuleHighlighting/multiplatform/triangleWithDependency/common_base/My.kt

@@ -0,0 +1 @@
+expect class My

idea/testData/multiModuleHighlighting/multiplatform/triangleWithDependency/common_derived/foo.kt

@@ -0,0 +1 @@
+expect fun foo(my: My)

idea/testData/multiModuleHighlighting/multiplatform/triangleWithDependency/jvm_derived/impl.kt

@@ -0,0 +1,3 @@
+class <error descr="[ACTUAL_MISSING] Declaration must be marked with 'actual'">My</error>
+
+actual fun foo(my: My) {}