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/primitives/database/src/lib.rs

@@ -103,6 +103,13 @@ pub trait Database<H: Clone + AsRef<[u8]>>: Send + Sync {
 	fn with_get(&self, col: ColumnId, key: &[u8], f: &mut dyn FnMut(&[u8])) {
 		self.get(col, key).map(|v| f(&v));
 	}
+
+	/// Check if database supports internal ref counting for state data.
+	///
+	/// For backwards compatibility returns `false` by default.
+	fn supports_ref_counting(&self) -> bool {
+		false
+	}
 }
 
 impl<H> std::fmt::Debug for dyn Database<H> {