update SMART monitoring to the use JSON (#15132)

* rework into a json app and support the old style

* working now

* add health checking

* add some datapoints to make writing alerts easy

* add a few missing item for has checks

* rework the app page

* use the right var for id9

* print the self test log if we have it

* add a graph for the max temp

* display the max temp graph

* display the health pass in the disk list if we have the data

* fix legacy handling and set app as ok

* replace id190 and id194 with the more useful maxtemp graph on the apps page

* don't print the additional info area for legacy extends

* add id232

* add id252 graph support

* properly display id232 now

* do not display SSD graphs for non-SSD disks

* for legacy extends, make sure we don't have a bad line

* add missing label for Product value

* fix metrics

* rework the metrics stuff a bit more

* typo fix

* more smart metrics cleanup

* add exit info to metrics

* style cleanup and logic checking for when disks are all now fine

* fix checking for no more health errors

* update the docs for SMART for v1 and remove slightly pointless notes about useSN

* update the docs

* initial test stuff

* add missing tests for the legacy code

* save if it it is legacy or not

* style cleanup

* update the smart legacy test

* style cleanup

* more test tweaking

* some more style cleanup

* more test fixes

* correct the disk ID for the legacy test da0 -> Z304VCFY

* more tests update

* more test cleanup

* begin cleanup of the v1 tests

* more v1 test updates

* more tests for v1

* more test cleanup

* fix exit_nonzero and add unhealthy metric

* add smart alerts

* add the metric unhealthy to the stat test

* use app data for the smart-common.inc.php

includes/html/pages/apps.inc.php

@@ -274,8 +274,7 @@ $graphs['smart'] = [
     'id184',
     'id187',
     'id188',
-    'id190',
-    'id194',
+    'maxtemp',
     'id196',
     'id197',
     'id198',