Sensors - Allow changing RRD type in YAML and PHP sensor discovery (#14208)

* new row variant

* syntax

* syntax

* DB

* syntax

* schema

* test

* allAdvaTests

* Tests

* Tests

* Tests

* missingMigration

* missingMigration

* Tests

* Tests

* Tests

* Tests

* tests

* tests

* tests

* tests

* tests

* test

* fix_Aos7

* fix snmprec arista

* fix snmprec arista

* fix snmprec arista

* tests

* merge_fix

* aos7 backslash

* aos7

* more

* more

* defaultValue

* arista

* typehint

* tests

* tests

* voss

* aos7

* aos7

* aos7

* testWithoutarista-mos_metamux48-c-0-16.json

* tests

* ciscosb

* new tests with 2004 and only sensors module

* adding wireless module again

* adding wireless module again (cont)

* airos

* aos7

* arista

* arista

* bdcom

* fortigate

* fortigate

* fortigate

* ftos

* ftos

* tests on 1804

* tests once more

* tests once more, cont

* tests once more, cont

* tests once more, cont

* tests once more, cont

* tests once more, cont

* more

* bdcom

* comware

* edgeosolt

* enexus

* arista-mos

* removeAristaAgain

* ies500_manual_edit

* ies500_manual_edit

* mni

* volius

* zywal

* manually imported arista-mos

* manually imported arista-mos

* arista-mos test is triggering something ...

* restoreArista

* tests

* tests

* aristamos

* ies52xxM_4206.json

* revert linux_supermicro.json

* revert linux_supermicro.json

* benuos

* fortiadc

* rnx-updu

doc/Developing/os/Health-Information.md

@@ -124,6 +124,9 @@ are as follows:
 - `user_func` (optional): You can provide a function name for the
   sensors value to be processed through (i.e. Convert fahrenheit to
   celsius use `fahrenheit_to_celsius`)
+- `rrd_type` (optional): You can change the type of the RRD file that will be created to
+  store the data. By default, type GAUGE is used. More details can be found here:
+  https://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html
 
 For `options:` you have the following available:
 
@@ -262,6 +265,9 @@ then passed to `discover_sensor()`.
   to celsius use `fahrenheit_to_celsius`)
 - $group = Defaults to null. Groups sensors together under in the
   webui, displaying this text.
+- $rrd_type = Default to 'GAUGE'. Allows to change the type of the RRD
+  file created for this sensor. More details can be found here in the
+  RRD documentation: https://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html
 
 For the majority of devices, this is all that's required to add
 support for a sensor. Polling is done based on the data gathered using