[AA] Add getCombinedMemberScope to KtScopeProvider

- The function is mostly for convenience, but scope providers will be
  able to optimize this scope if needed (similar to how combined
  declared member scopes are already optimized).
- `getCombinedMemberScope` will be used by `KDocReferenceResolver`.

^KT-61900

analysis/analysis-api/src/org/jetbrains/kotlin/analysis/api/components/KtScopeProvider.kt

@@ -23,6 +23,13 @@ public abstract class KtScopeProvider : KtAnalysisSessionComponent() {
 
     public abstract fun getStaticMemberScope(symbol: KtSymbolWithMembers): KtScope
 
+    public open fun getCombinedMemberScope(symbol: KtSymbolWithMembers): KtScope = getCompositeScope(
+        listOf(
+            getMemberScope(symbol),
+            getStaticMemberScope(symbol),
+        )
+    )
+
     public abstract fun getDeclaredMemberScope(classSymbol: KtSymbolWithMembers): KtScope
 
     public abstract fun getStaticDeclaredMemberScope(classSymbol: KtSymbolWithMembers): KtScope
@@ -143,6 +150,12 @@ public interface KtScopeProviderMixIn : KtAnalysisSessionMixIn {
     public fun KtSymbolWithMembers.getStaticMemberScope(): KtScope =
         withValidityAssertion { analysisSession.scopeProvider.getStaticMemberScope(this) }
 
+    /**
+     * Returns a [KtScope] containing all members from [getMemberScope] and [getStaticMemberScope].
+     */
+    public fun KtSymbolWithMembers.getCombinedMemberScope(): KtScope =
+        withValidityAssertion { analysisSession.scopeProvider.getCombinedMemberScope(this) }
+
     /**
      * Returns a [KtScope] containing the *non-static* callables and all classifiers explicitly declared in the given [KtSymbolWithMembers].
      *