[FIR] optimize direct allocation of empty ConeTypeProjection arrays

On the snapshot from KTIJ-26260 empty ConeTypeProjection arrays take about 10mb

plugins/fir-plugin-prototype/src/org/jetbrains/kotlin/fir/plugin/types/FirNumberSignAttributeExtension.kt

@@ -43,7 +43,7 @@ class FirNumberSignAttributeExtension(session: FirSession) : FirTypeAttributeExt
             annotationTypeRef = buildResolvedTypeRef {
                 type = ConeClassLikeTypeImpl(
                     classId.toLookupTag(),
-                    emptyArray(),
+                    ConeTypeProjection.EMPTY_ARRAY,
                     isNullable = false
                 )
             }

plugins/parcelize/parcelize-compiler/parcelize.k2/src/org/jetbrains/kotlin/parcelize/fir/diagnostics/FirParcelizeClassChecker.kt

@@ -78,7 +78,7 @@ object FirParcelizeClassChecker : FirClassChecker() {
             val superType = superTypeRef.coneType
             val parcelableType = ConeClassLikeTypeImpl(
                 PARCELABLE_ID.toLookupTag(),
-                emptyArray(),
+                ConeTypeProjection.EMPTY_ARRAY,
                 isNullable = false
             )
             if (superType.isSubtypeOf(parcelableType, context.session)) {