New database trait (#5549)

* Introduce trait

* The trait

* Generic

* Basic impls.

* Remove unneeded bounds

* Minor changes

* Switch over to the new DB trait

* Integrated parity-db and added CLI for db selection

* Default impl.

* Fix logs.

* Started integrating subdb

* Apply suggestions from code review

Co-Authored-By: Cecile Tonglet <cecile@parity.io>

* Apply suggestions from code review

Co-Authored-By: Nikolay Volf <nikvolf@gmail.com>

* Enable subdb

* Bump parity-db

* Fixed CLI macro

* Fixed browser build

* Fixed features

* Sort out features

* Use parity-db from crates.io

* Typo

Co-authored-by: arkpar <arkady.paronyan@gmail.com>
Co-authored-by: Cecile Tonglet <cecile@parity.io>
Co-authored-by: Nikolay Volf <nikvolf@gmail.com>

substrate/utils/browser/src/lib.rs

@@ -70,7 +70,7 @@ where
 			info!("Opening Indexed DB database '{}'...", name);
 			let db = kvdb_web::Database::open(name, 10).await?;
 
-			DatabaseConfig::Custom(Arc::new(db))
+			DatabaseConfig::Custom(sp_database::as_database(db))
 		},
 		keystore: KeystoreConfig::InMemory,
 		default_heap_pages: Default::default(),