wifi: iwlwifi: mld: don't check the TPT counters when scanning

wifi: iwlwifi: mld: don't check the TPT counters when scanning

If there is an ongoing scan that lasts long, the MPDU counters may not
increase enough due the device being busy with scanning and not
because we are in a low throughput scenario.

In that case we don't want to block EMLSR.
Instead, stop checking the counters from the moment we started
scanning, and when the scan ends - clear the counters and schedule a
check in 5 seconds, as usual.

Note that this is only done for regular scan since MLO scan is too short
to affect the counters, and scheduled scan is mainly used when we are
not connected.

Also note that we only stop checking whether to block EMLSR, and not if to
unblock.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Link: https://patch.msgid.link/20250505215512.330ea440d19c.Ib10dae0b7a0cb0e10c59a9edf5ff7af0f065ac60@changeid
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>