[wlantool] Add arguments for scan type

Add wlantool arguments to scan and connect commands to specify whether
the scan should be active or passive.

WLAN-283 #comment
WLAN-687 #comment

Test:
1. Verify that wlantool scan and connect commands have active scanning
   argument. Verify via log that the correct scan requests get
   constructed.
2. Sanity test legacy `wlan scan` and `wlan connect` still work.
3. `fx run-test wlan-sme-tests`

Change-Id: I1078b3f7ca6146f67ef0e874656823df5a9dacb6
12 files changed