Remove discarded blocks and states from database by default (#11983)

* 1.Add pruning param "canonical" in sc-cli.
2.Make PruningMode's default value to ArchiveCanonical.

* Update tests in sc-state-db.

* Update tests in sc-state-db.

* 1.Add a new value `AllWithNonFinalized` in `enum BlocksPruning` which Corresponds to `blocks_pruning 0` in CLI .
2.Change value `All` to `AllFinalized` in `enum BlocksPruning` and make it to keep full finalized block history.

* Make some corresponding adjustments based on the content in the conversation.

* Update client/db/src/lib.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* Apply suggestions from code review.

* 1.Change `blocks_pruning` to be like `state_pruning` .

* Fmt and add some doc.

* Update client/cli/src/params/pruning_params.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* Update client/cli/src/params/pruning_params.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* Update doc.

* Change `new_test_with_tx_storage` to take `BlocksPruning`.

* Fmt

Co-authored-by: Bastian Köcher <git@kchr.de>

substrate/client/cli/src/config.rs

@@ -251,11 +251,11 @@ pub trait CliConfiguration<DCV: DefaultConfigurationValues = ()>: Sized {
 	/// Get the block pruning mode.
 	///
 	/// By default this is retrieved from `block_pruning` if it is available. Otherwise its
-	/// `BlocksPruning::All`.
+	/// `BlocksPruning::KeepFinalized`.
 	fn blocks_pruning(&self) -> Result<BlocksPruning> {
 		self.pruning_params()
 			.map(|x| x.blocks_pruning())
-			.unwrap_or_else(|| Ok(BlocksPruning::All))
+			.unwrap_or_else(|| Ok(BlocksPruning::KeepFinalized))
 	}
 
 	/// Get the chain ID (string).