LL API: unwrap callable copies while determining their sources

In previous commit (K2: prefer derived class sources...)
we changed default source for callable copy (e.g. substitution override)
to its owner class. This can create an unexpected situation in LL API,
because normally KtCallableDeclaration is expected to be a source.
This commit introduces "compensation" on analysis API side.

analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/lazy/resolve/FirLazyBodiesCalculator.kt

@@ -78,7 +78,7 @@ internal object FirLazyBodiesCalculator {
 
 private inline fun <reified T : FirDeclaration> revive(
     designation: FirDesignation,
-    psiFactory: (FirDesignation) -> PsiElement? = { it.target.psi }
+    psi: PsiElement? = designation.target.psi
 ): T {
     val session = designation.target.moduleData.session
 
@@ -86,7 +86,7 @@ private inline fun <reified T : FirDeclaration> revive(
         session = session,
         scopeProvider = session.kotlinScopeProvider,
         designation = designation,
-        rootNonLocalDeclaration = psiFactory(designation) as KtAnnotated,
+        rootNonLocalDeclaration = psi as KtAnnotated,
     ) as T
 }
 
@@ -157,7 +157,7 @@ private fun calculateLazyBodiesForFunction(designation: FirDesignation) {
     val simpleFunction = designation.target as FirSimpleFunction
     require(needCalculatingLazyBodyForFunction(simpleFunction))
 
-    val newSimpleFunction = revive<FirSimpleFunction>(designation)
+    val newSimpleFunction = revive<FirSimpleFunction>(designation, simpleFunction.unwrapFakeOverridesOrDelegated().psi)
 
     replaceLazyContractDescription(simpleFunction, newSimpleFunction)
     replaceLazyBody(simpleFunction, newSimpleFunction)
@@ -180,7 +180,7 @@ private fun calculateLazyBodyForProperty(designation: FirDesignation) {
     val firProperty = designation.target as FirProperty
     if (!needCalculatingLazyBodyForProperty(firProperty)) return
 
-    val newProperty = revive<FirProperty>(designation)
+    val newProperty = revive<FirProperty>(designation, firProperty.unwrapFakeOverridesOrDelegated().psi)
 
     firProperty.getter?.let { getter ->
         val newGetter = newProperty.getter!!
@@ -238,7 +238,7 @@ private fun calculateLazyBodiesForField(designation: FirDesignation) {
     val field = designation.target as FirField
     require(field.initializer is FirLazyExpression)
 
-    val newField = revive<FirField>(designation) { it.path.last().psi }
+    val newField = revive<FirField>(designation, designation.path.last().psi)
     field.replaceInitializer(newField.initializer)
 }