FIR IDE/LC: introduce/use delegated member scope

analysis/analysis-api/testData/scopes/delegatedMemberScope/simple.kt

@@ -0,0 +1,12 @@
+// DO_NOT_CHECK_SYMBOL_RESTORE
+
+interface I {
+    fun foo()
+}
+
+class A(
+    private val p: I
+) : I by p
+
+// class: A
+

analysis/analysis-api/testData/scopes/delegatedMemberScope/simple.txt

@@ -0,0 +1,24 @@
+KtFunctionSymbol:
+  annotatedType: [] kotlin/Unit
+  annotationClassIds: []
+  annotations: []
+  callableIdIfNonLocal: /I.foo
+  dispatchType: A
+  hasStableParameterNames: true
+  isExtension: false
+  isExternal: false
+  isInfix: false
+  isInline: false
+  isOperator: false
+  isOverride: false
+  isStatic: false
+  isSuspend: false
+  modality: OPEN
+  name: foo
+  origin: DELEGATED
+  receiverType: null
+  symbolKind: CLASS_MEMBER
+  typeParameters: []
+  valueParameters: []
+  visibility: Public
+  deprecationStatus: null

analysis/analysis-api/testData/scopes/delegatedMemberScope/withOverridden.kt

@@ -0,0 +1,27 @@
+// DO_NOT_CHECK_SYMBOL_RESTORE
+
+interface I1 {
+    fun foo()
+}
+
+class I1Impl: I1 {
+    override fun foo() {}
+}
+
+interface I2 {
+    fun bar()
+    fun baz()
+}
+
+class I2Impl: I2 {
+    override fun bar() {}
+    override fun baz() {}
+}
+
+open class A : I1 by I1Impl()
+
+class B : I2 by I2Impl(), A() {
+    override fun baz() {}
+}
+
+// class: B

analysis/analysis-api/testData/scopes/delegatedMemberScope/withOverridden.txt

@@ -0,0 +1,24 @@
+KtFunctionSymbol:
+  annotatedType: [] kotlin/Unit
+  annotationClassIds: []
+  annotations: []
+  callableIdIfNonLocal: /I2.bar
+  dispatchType: B
+  hasStableParameterNames: true
+  isExtension: false
+  isExternal: false
+  isInfix: false
+  isInline: false
+  isOperator: false
+  isOverride: false
+  isStatic: false
+  isSuspend: false
+  modality: OPEN
+  name: bar
+  origin: DELEGATED
+  receiverType: null
+  symbolKind: CLASS_MEMBER
+  typeParameters: []
+  valueParameters: []
+  visibility: Public
+  deprecationStatus: null