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/cli/src/commands/purge_chain_cmd.rs

@@ -21,7 +21,7 @@ use crate::{
 	params::{DatabaseParams, SharedParams},
 	CliConfiguration,
 };
-use sc_service::DatabaseConfig;
+use sc_service::DatabaseSource;
 use std::{
 	fmt::Debug,
 	fs,
@@ -47,7 +47,7 @@ pub struct PurgeChainCmd {
 
 impl PurgeChainCmd {
 	/// Run the purge command
-	pub fn run(&self, database_config: DatabaseConfig) -> error::Result<()> {
+	pub fn run(&self, database_config: DatabaseSource) -> error::Result<()> {
 		let db_path = database_config.path().ok_or_else(|| {
 			error::Error::Input("Cannot purge custom database implementation".into())
 		})?;