[FIR] Properly assign <local> packages to symbols

This prevents `FirConflictsExpressionChecker.kt`
from missing conflicting local functions. It used
to due to inconsistencies in assigning `<local>`,
and this commit makes it a bit more
straightforward.

The change in KtClassTypeQualifierRenderer
prevents `FirOverrideImplementTest.testLocalClass`
from failing in `intellij`. It didn't fail for
callables, because `KtCallableSignatureRenderer`
doesn't try to render packages.

^KT-59186 Fixed

compiler/fir/analysis-tests/testData/resolve/inlineClasses/inlineClassDeclaration.fir.txt

@@ -16,7 +16,7 @@ FILE: inlineClassDeclaration.kt
 
         public final fun foo(): R|kotlin/Unit| {
             local final inline class C : R|kotlin/Any| {
-                public constructor(x: R|kotlin/Int|): R|A.C| {
+                public constructor(x: R|kotlin/Int|): R|<local>/C| {
                     super<R|kotlin/Any|>()
                 }