[FIR2IR] Properly cache generated data/value class members

FIR instances of generated toString/hashCode/equals are session dependant,
  so we need some cache, which operates only session-independent stuff.
  Pair of `FirClass` and `Name` was chosen here

Previously SymbolTable played the role of this cache (with signatures as
  keys). But it should be replaced in scope of KT-66341 and KT-64990

core/compiler.common/src/org/jetbrains/kotlin/util/OperatorNameConventions.kt

@@ -113,4 +113,9 @@ object OperatorNameConventions {
         RANGE_TO to "..",
         RANGE_UNTIL to "..<",
     )
+
+    fun isComponentN(name: Name): Boolean {
+        val identifier = name.identifierOrNullIfSpecial ?: return false
+        return COMPONENT_REGEX.matches(identifier)
+    }
 }