[FIR] Unify implementations of toSymbol and getSymbolByLookupTag

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt

@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.fir.references.impl.FirPropertyFromParameterResolved
 import org.jetbrains.kotlin.fir.resolve.*
 import org.jetbrains.kotlin.fir.resolve.calls.SyntheticPropertySymbol
 import org.jetbrains.kotlin.fir.resolve.providers.FirProvider
+import org.jetbrains.kotlin.fir.resolve.toSymbol
 import org.jetbrains.kotlin.fir.scopes.ProcessorAction
 import org.jetbrains.kotlin.fir.scopes.processDirectlyOverriddenFunctions
 import org.jetbrains.kotlin.fir.scopes.processDirectlyOverriddenProperties

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrClassifierStorage.kt

@@ -466,4 +466,4 @@ class Fir2IrClassifierStorage(
         return getCachedIrTypeParameter(firTypeParameterSymbol.fir, typeContext = typeContext)?.symbol
             ?: error("Cannot find cached type parameter by FIR symbol: ${firTypeParameterSymbol.name}")
     }
-}
+}