Bluetooth: Shell: Remove usage of auto name in AD

The advertiser options to automatically add the name in the scan
response and the advertising data will be deprecated.

Update the Bluetooth shell and its documentation to not use those
options anymore.

The option of the legacy advertiser run with `bt advertise` and the
behavior hasn't changed. The code has been updated to no longer use the
advertiser option but the original behavior has been reproduced.

The option of the extended advertiser have been updated to be more
explicit. The options `name` and `name-ad` have been removed from the
`bt adv-create` and `bt adv-param`. The option `name` and `dev-name`
have been added to the `bt adv-data` command.

- `name <str>` will advertise the given name.
- `dev-name` will advertise the device name.

Signed-off-by: Théo Battrel <theo.battrel@nordicsemi.no>