[K2] Fix EXPECTED_DECLARATION_WITH_BODY not reporting on property accessors

We don't want any `expect` function to have body. So we're sure no
new false-positive reports are introduced because of removal of
`isTopLevelOrInsideClass` condition.

^KT-59899 Fixed

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirExpectConsistencyChecker.kt

@@ -46,7 +46,7 @@ object FirExpectConsistencyChecker : FirBasicDeclarationChecker() {
             reporter.reportOn(source, FirErrors.EXPECTED_PRIVATE_DECLARATION, context)
         }
 
-        if (isProhibitedDeclarationWithBody(declaration, isTopLevelOrInsideClass)) {
+        if (isProhibitedDeclarationWithBody(declaration)) {
             reporter.reportOn(source, FirErrors.EXPECTED_DECLARATION_WITH_BODY, context)
         }
     }
@@ -68,7 +68,7 @@ object FirExpectConsistencyChecker : FirBasicDeclarationChecker() {
         return isTopLevelOrInsideClass && declaration !is FirConstructor && Visibilities.isPrivate(declaration.visibility)
     }
 
-    private fun isProhibitedDeclarationWithBody(declaration: FirMemberDeclaration, isTopLevelOrInsideClass: Boolean): Boolean {
-        return isTopLevelOrInsideClass && declaration is FirFunction && declaration.hasBody
+    private fun isProhibitedDeclarationWithBody(declaration: FirMemberDeclaration): Boolean {
+        return declaration is FirFunction && declaration.hasBody
     }
 }

compiler/testData/diagnostics/tests/modifiers/openInExpectInterface.fir.kt

@@ -13,7 +13,7 @@ expect interface My {
 
     open val a: Int
     open val b: String
-    open val c: String get() = ""
+    open val c: String <!EXPECTED_DECLARATION_WITH_BODY!>get()<!> = ""
     <!REDUNDANT_MODIFIER!>open<!> abstract val e: Int
 
     val f: Int

compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassWithFunctionBody.fir.kt

@@ -18,8 +18,8 @@
     val prop: String = <!EXPECTED_PROPERTY_INITIALIZER!>"no"<!>
 
     var getSet: String
-        get() = "no"
-        set(value) {}
+        <!EXPECTED_DECLARATION_WITH_BODY!>get()<!> = "no"
+        <!EXPECTED_DECLARATION_WITH_BODY!>set(value)<!> {}
 
     <!EXPECTED_DECLARATION_WITH_BODY!>fun functionWithBody(x: Int): Int<!> {
         return x + 1

compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.fir.kt

@@ -17,10 +17,10 @@
     var backingFieldVar: String = <!EXPECTED_PROPERTY_INITIALIZER!>"no"<!>
 
     val customAccessorVal: String
-    get() = "no"
+    <!EXPECTED_DECLARATION_WITH_BODY!>get()<!> = "no"
     var customAccessorVar: String
-    get() = "no"
-    set(value) {}
+    <!EXPECTED_DECLARATION_WITH_BODY!>get()<!> = "no"
+    <!EXPECTED_DECLARATION_WITH_BODY!>set(value)<!> {}
 
     <!EXPECTED_LATEINIT_PROPERTY!>lateinit<!> var lateinitVar: String