Change default execution strategies to `Wasm` (#11170)

This pr changes all default execution strategies to `Wasm`. This is basically a deprecation of the
native runtime. While the native runtime isn't removed and can still be used, it will not be used
anymore by default.

This will also improve the usage for people who want to run random commits, which most often forget
to run with `--execution wasm`. Otherwise they often run into storage root mismatches because of
using the native runtime.

substrate/client/cli/src/arg_enums.rs

@@ -281,14 +281,14 @@ impl Into<sc_network::config::SyncMode> for SyncMode {
 }
 
 /// Default value for the `--execution-syncing` parameter.
-pub const DEFAULT_EXECUTION_SYNCING: ExecutionStrategy = ExecutionStrategy::NativeElseWasm;
+pub const DEFAULT_EXECUTION_SYNCING: ExecutionStrategy = ExecutionStrategy::Wasm;
 /// Default value for the `--execution-import-block` parameter.
-pub const DEFAULT_EXECUTION_IMPORT_BLOCK: ExecutionStrategy = ExecutionStrategy::NativeElseWasm;
+pub const DEFAULT_EXECUTION_IMPORT_BLOCK: ExecutionStrategy = ExecutionStrategy::Wasm;
 /// Default value for the `--execution-import-block` parameter when the node is a validator.
 pub const DEFAULT_EXECUTION_IMPORT_BLOCK_VALIDATOR: ExecutionStrategy = ExecutionStrategy::Wasm;
 /// Default value for the `--execution-block-construction` parameter.
 pub const DEFAULT_EXECUTION_BLOCK_CONSTRUCTION: ExecutionStrategy = ExecutionStrategy::Wasm;
 /// Default value for the `--execution-offchain-worker` parameter.
-pub const DEFAULT_EXECUTION_OFFCHAIN_WORKER: ExecutionStrategy = ExecutionStrategy::Native;
+pub const DEFAULT_EXECUTION_OFFCHAIN_WORKER: ExecutionStrategy = ExecutionStrategy::Wasm;
 /// Default value for the `--execution-other` parameter.
-pub const DEFAULT_EXECUTION_OTHER: ExecutionStrategy = ExecutionStrategy::Native;
+pub const DEFAULT_EXECUTION_OTHER: ExecutionStrategy = ExecutionStrategy::Wasm;