FIR tree: support const expressions (adds IR dependency) #KT-24023 Fixed

Also support generic tree elements in FIR visitor generator

compiler/fir/tree/build.gradle.kts

@@ -13,6 +13,7 @@ jvmTarget = "1.6"
 dependencies {
     compile(project(":core:descriptors"))
     compile(project(":compiler:fir:cones"))
+    compile(project(":compiler:ir.tree"))
     // Necessary only to store bound PsiElement inside FirElement
     compileOnly(intellijCoreDep()) { includeJars("intellij-core", "annotations") }
 }