[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/raw-fir/psi2fir/testData/rawBuilder/declarations/script.txt

@@ -40,7 +40,7 @@ FILE: script.kts
         build#(<L> = build@fun <implicit>.<anonymous>(): <implicit> <inline=Unknown>  {
             version# = String(123)
             local final? class A : R|kotlin/Any| {
-                public? [ContainingClassKey=A] constructor(): R|A| {
+                public? [ContainingClassKey=A] constructor(): R|<local>/A| {
                     super<R|kotlin/Any|>()
                 }