[Edgecore][platform][as7726-32x] Add thermal threshold configuration.

[roger530-ho]

Signed-off-by: roger530-ho roger530_ho@accton.com

Why I did it
The user needs to adjust the thermal threshold during system runtime to meet different deployment cases.

How I did it

1. Implement set_xxx_threshold method to create /tmp/device_threshold.json during system runtime for saving new threshold.
2. The get_xxx_threshold method first gets the threshold from /tmp/device_threshold.json; otherwise, it gets the value from the default threshold.

How to verify it

1. Provide utility to configure the new threshold as below.

 admin@sonic:~$ sudo accton_as7726_32x_util.py threshold -h
usage: accton_as7726_32x_util.py threshold [-h] [-l] [-t THERMAL_NAME] [-ht THRESHOLD_VALUE] [-hct THRESHOLD_VALUE]

optional arguments:
  -h, --help            show this help message and exit
  -l                    list avaliable thermal
  -t THERMAL_NAME       thermal name, ex: -t 'Temp sensor 1'
  -ht THRESHOLD_VALUE   high threshold: 30.0 ~ 110.0
  -hct THRESHOLD_VALUE  high critical threshold : 30.0 ~ 110.0
admin@sonic:~$ sudo accton_as7726_32x_util.py threshold -l
Thermals: 'Temp sensor 1', 'Temp sensor 2', 'Temp sensor 3', 'Temp sensor 4', 'Temp sensor 5', 'Temp sensor 6', 'PSU-1 temp sensor 1', 'PSU-2 temp sensor 1'

2. Perform 'show platform temperature' to verify the new threshold as below.

 admin@sonic:~$ show platform temperature
             Sensor    Temperature    High TH    Low TH    Crit High TH    Crit Low TH    Warning          Timestamp
-------------------  -------------  ---------  --------  --------------  -------------  ---------  -----------------
PSU-1 temp sensor 1            0           80       N/A             N/A            N/A      False  20220926 16:58:31
PSU-2 temp sensor 1           29           80       N/A             N/A            N/A      False  20220926 16:58:31
      Temp sensor 1           27           80       N/A             N/A            N/A      False  20220926 16:58:30
      Temp sensor 2           31           80       N/A             N/A            N/A      False  20220926 16:58:30
      Temp sensor 3           28.5         80       N/A             N/A            N/A      False  20220926 16:58:30
      Temp sensor 4           27           80       N/A             N/A            N/A      False  20220926 16:58:30
      Temp sensor 5           28           80       N/A             N/A            N/A      False  20220926 16:58:30
      Temp sensor 6           38           82       N/A           104.0            N/A      False  20220926 16:58:30

admin@sonic:~$ sudo accton_as7726_32x_util.py threshold -t 'Temp sensor 3' -ht 77
Apply the new high threshold successfully.
admin@sonic:~$ show platform temperature
             Sensor    Temperature    High TH    Low TH    Crit High TH    Crit Low TH    Warning          Timestamp
-------------------  -------------  ---------  --------  --------------  -------------  ---------  -----------------
PSU-1 temp sensor 1            0           80       N/A             N/A            N/A      False  20220926 17:03:30
PSU-2 temp sensor 1           29           80       N/A             N/A            N/A      False  20220926 17:03:30
      Temp sensor 1           27           80       N/A             N/A            N/A      False  20220926 17:03:29
      Temp sensor 2           31           80       N/A             N/A            N/A      False  20220926 17:03:29
      Temp sensor 3           28.5         77       N/A             N/A            N/A      False  20220926 17:03:29
      Temp sensor 4           27           80       N/A             N/A            N/A      False  20220926 17:03:29
      Temp sensor 5           28           80       N/A             N/A            N/A      False  20220926 17:03:29
      Temp sensor 6           38           82       N/A           104.0            N/A      False  20220926 17:03:29

admin@sonic:~$ sudo accton_as7726_32x_util.py threshold -t 'Temp sensor 3' -ht 80
Apply the new high threshold successfully.
admin@sonic:~$ show platform temperature
             Sensor    Temperature    High TH    Low TH    Crit High TH    Crit Low TH    Warning          Timestamp
-------------------  -------------  ---------  --------  --------------  -------------  ---------  -----------------
PSU-1 temp sensor 1            0           80       N/A             N/A            N/A      False  20220926 17:05:30
PSU-2 temp sensor 1           29           80       N/A             N/A            N/A      False  20220926 17:05:30
      Temp sensor 1           27           80       N/A             N/A            N/A      False  20220926 17:05:29
      Temp sensor 2           31           80       N/A             N/A            N/A      False  20220926 17:05:29
      Temp sensor 3           28.5         80       N/A             N/A            N/A      False  20220926 17:05:29
      Temp sensor 4           27           80       N/A             N/A            N/A      False  20220926 17:05:29
      Temp sensor 5           28           80       N/A             N/A            N/A      False  20220926 17:05:29
      Temp sensor 6           38           82       N/A           104.0            N/A      False  20220926 17:05:29

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
• 202211

Description for the changelog

Ensure to add label/tag for the feature raised. example - PR#2174 under sonic-utilities repo. where, Generic Config and Update feature has been labelled as GCU.

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

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