[LL FIR] optimize search for fir declaration by kt declaration

Introduce new API to traverse FirFile by known declaration path
instead of unoptimized findSourceByTraversingWholeTree

^KT-59454

analysis/low-level-api-fir/build.gradle.kts

@@ -76,6 +76,7 @@ allprojects {
         kotlinOptions {
             freeCompilerArgs += "-opt-in=org.jetbrains.kotlin.fir.symbols.SymbolInternals"
             freeCompilerArgs += "-opt-in=org.jetbrains.kotlin.analysis.low.level.api.fir.LLFirInternals"
+            freeCompilerArgs += "-opt-in=org.jetbrains.kotlin.analysis.api.KtAnalysisApiInternals"
         }
     }
 }