* frame-system: explicit call index

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Use explicit call indices

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* pallet-template: explicit call index

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* DNM: Temporarily require call_index

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Revert "DNM: Temporarily require call_index"

This reverts commit c4934e312e12af72ca05a8029d7da753a9c99346.

Signed-off-by: Oliver Tale-Yazdi <[email protected]>