cmd/utils: grant snapshot cache to trie if disabled (#21416)

* cmd/utils: grant snapshot cache to trie if disabled

* eth: fix up default non-mainnet cache distribution

cmd/utils/flags.go

@@ -1542,6 +1542,7 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
 		cfg.SnapshotCache = ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheSnapshotFlag.Name) / 100
 	}
 	if !ctx.GlobalIsSet(SnapshotFlag.Name) {
+		cfg.TrieCleanCache += cfg.SnapshotCache
 		cfg.SnapshotCache = 0 // Disabled
 	}
 	if ctx.GlobalIsSet(DocRootFlag.Name) {