supplicant: increase the PMK lifetime for WPA-EAP

By default, wpa_supplicant sets these parameters according to the
802.11 standard:

  dot11RSNAConfigPMKLifetime = 43200 seconds (12 hours)
  dot11RSNAConfigPMKReauthThreshold = 70%

With these, the supplicant triggers a new EAP authentication every 8
hours and 24 minutes. If the network uses one-time secrets, the
reauthentication fails and the supplicant disconnects. It doesn't seem
desirable that the client starts a reauthentication so early; bump the
lifetime to a week.

Currently, due to a bug, the new value is ignored by wpa_supplicant
when set via D-Bus. This patch needs the fix at [1], not yet merged.

[1] http://lists.infradead.org/pipermail/hostap/2022-July/040664.html

!1306
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