DatabaseSource::Auto (#9500)

* implement "auto" database backend in client/db, in progress, #9201

* move fn supports_ref_counting from DatabaseSource enum to Database trait to make it work correctly for all types of dbs

* update kvdb_rocksdb to 0.13 and use it's new config feature  to properly auto start existing database

* tests for auto database reopening

* introduce OpenDbError to cleanup opening database error handling and handle case when database is not enabled at the compile time

* cargo fmt strings again

* cargo fmt strings again

* rename DataSettingsSrc to fix test compilation

* fix the call to the new kvdb-rocksdb interdace in tests to fix compilation

* simplify OpenDbError and make it compile even when paritydb and rocksdb are disabled

* cargo fmt

* fix compilation without flag with-parity-db

* fix unused var compilation warning

* support different paths for rocksdb and paritydb in DatabaseSouce::Auto

* support "auto" database option in substrate cli

* enable Lz4 compression for some of the parity-db colums as per review suggestion

* applied review suggestions

substrate/utils/browser/src/lib.rs

@@ -27,7 +27,7 @@ use log::{debug, info};
 use sc_chain_spec::Extension;
 use sc_network::config::TransportConfig;
 use sc_service::{
-	config::{DatabaseConfig, KeystoreConfig, NetworkConfiguration},
+	config::{DatabaseSource, KeystoreConfig, NetworkConfiguration},
 	Configuration, GenericChainSpec, KeepBlocks, Role, RpcHandlers, RpcSession, RuntimeGenesis,
 	TaskManager, TransactionStorageMode,
 };
@@ -83,7 +83,7 @@ where
 			info!("Opening Indexed DB database '{}'...", name);
 			let db = kvdb_memorydb::create(10);
 
-			DatabaseConfig::Custom(sp_database::as_database(db))
+			DatabaseSource::Custom(sp_database::as_database(db))
 		},
 		keystore_remote: Default::default(),
 		keystore: KeystoreConfig::InMemory,