Add test for check expect/actual gutters at same module.

idea/testData/multiModuleLineMarker/expectWithActualInSameModule/common/common.kt

@@ -0,0 +1,9 @@
+package sample
+
+expect fun <lineMarker descr="Has actuals in common">sameFile</lineMarker>()
+
+actual fun <lineMarker>sameFile</lineMarker>() = Unit
+
+expect fun <lineMarker descr="Has actuals in common">sameModule</lineMarker>()
+
+fun noExpectActualDeclaration() = Unit

idea/testData/multiModuleLineMarker/expectWithActualInSameModule/common/sample.kt

@@ -0,0 +1,5 @@
+// !CHECK_HIGHLIGHTING
+
+package sample
+
+actual fun sameModule() = Unit