[Analysis API] optimize RAM consumption in ValidityAwareCachedValue

- make it inline class
- remove non-required `token` field

^KTIJ-22749

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/utils/ValidityAwareCachedValue.kt

@@ -6,7 +6,6 @@
 package org.jetbrains.kotlin.analysis.api.fir.utils
 
 import org.jetbrains.kotlin.analysis.api.lifetime.KtLifetimeOwner
-import org.jetbrains.kotlin.analysis.api.lifetime.KtLifetimeToken
 import org.jetbrains.kotlin.analysis.api.lifetime.assertIsValidAndAccessible
 import kotlin.properties.ReadOnlyProperty
 import kotlin.reflect.KProperty
@@ -14,16 +13,17 @@ import kotlin.reflect.KProperty
 /**
  * Lazy value that guaranties safe publication and checks validity on every access
  */
-class ValidityAwareCachedValue<T>(
-    private val token: KtLifetimeToken,
-    init: () -> T
+@JvmInline
+value class ValidityAwareCachedValue<T>(
+    private val lazyValue: Lazy<T>,
 ) : ReadOnlyProperty<Any, T> {
-    private val lazyValue = lazy(LazyThreadSafetyMode.PUBLICATION, init)
 
     override fun getValue(thisRef: Any, property: KProperty<*>): T {
-        token.assertIsValidAndAccessible()
+        require(thisRef is KtLifetimeOwner)
+        thisRef.token.assertIsValidAndAccessible()
         return lazyValue.value
     }
 }
 
-internal fun <T> KtLifetimeOwner.cached(init: () -> T) = ValidityAwareCachedValue(token, init)
+@Suppress("UnusedReceiverParameter") // we need to have the KtLifetimeOwner as receiver to make sure it's called only for KtLifetimeOwner
+internal fun <T> KtLifetimeOwner.cached(init: () -> T) = ValidityAwareCachedValue(lazy(LazyThreadSafetyMode.PUBLICATION, init))