ci: bump ci image for rust 1.70 (#14399)

* ci: bump ci image for rust 1.70

* ".git/.scripts/commands/update-ui/update-ui.sh" 1.70

* chore: ignore the new let_with_type_underscore lint

---------

Co-authored-by: command-bot <>

substrate/primitives/api/test/tests/ui/impl_missing_version.stderr

@@ -1,9 +1,3 @@
-error[E0433]: failed to resolve: could not find `ApiV4` in `runtime_decl_for_api`
-  --> tests/ui/impl_missing_version.rs:18:13
-   |
-18 |     impl self::Api<Block> for Runtime {
-   |                ^^^ could not find `ApiV4` in `runtime_decl_for_api`
-
 error[E0405]: cannot find trait `ApiV4` in module `self::runtime_decl_for_api`
   --> tests/ui/impl_missing_version.rs:18:13
    |