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/client/service/src/config.rs

@@ -19,10 +19,7 @@
 //! Service configuration.
 
 pub use sc_client_api::execution_extensions::{ExecutionStrategies, ExecutionStrategy};
-pub use sc_client_db::{
-	Database, DatabaseSettingsSrc as DatabaseConfig, KeepBlocks, PruningMode,
-	TransactionStorageMode,
-};
+pub use sc_client_db::{Database, DatabaseSource, KeepBlocks, PruningMode, TransactionStorageMode};
 pub use sc_executor::WasmExecutionMethod;
 pub use sc_network::{
 	config::{
@@ -69,7 +66,7 @@ pub struct Configuration {
 	/// Remote URI to connect to for async keystore support
 	pub keystore_remote: Option<String>,
 	/// Configuration for the database.
-	pub database: DatabaseConfig,
+	pub database: DatabaseSource,
 	/// Size of internal state cache in Bytes
 	pub state_cache_size: usize,
 	/// Size in percent of cache size dedicated to child tries