Selectable on-runtime-upgrade checks (#13045)

* Make try-runtime checks selectable

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update frame/support/src/traits/try_runtime.rs

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

* Add Clap wrapper for enum UpgradeCheckSelect

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Revert "Add Clap wrapper for enum UpgradeCheckSelect"

This reverts commit e29538c1a79d1711b43addc9400d871f6aa32844.

* fix pools sanity check

* Set default for --checks to None

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Make --checks backwards comp

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Add clap attr comment

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: kianenigma <kian@parity.io>