[Accton][platform][device]: Enhance AS9726-32D sonic_platform feature.

[ec-michael-shih]

Why I did it

Enhance features and sonic-platform and fixed bugs on this platform.

How I did it

Code base is PR14237 and enhance features on it.
Finally to do sonic-mgmt(202311) pytest successfully.

How to verify it

1. Check sonic-platform command and show good:
   show platform {fan, temperature, firmware status, syseeprom, psustatus}
2. Do sonic-mgmt pytest:
   test_thermal.log
   test_thermal_state_db.log
   test_watchdog.log
   test_xcvr_info_in_db.log
   test_chassis.log
   test_chassis_fans.log
   test_component.log
   test_fan_drawer.log
   test_fan_drawer_fans.log
   test_fancontrol.log
   test_fwutil.log
   test_ledd.log
   test_module.log
   test_pcied.log
   test_platform_info.log
   test_psu.log
   test_psu_fans.log
   test_psud.log
   test_sensors.log
   test_sfp.log
   test_sfpshow.log
   test_sfputil.log
   test_show_intf_xcvr.log
   test_show_platform.log
   test_snmp_psu.log
   test_syseepromd.log
   test_system_health.log
   test_system_status.log

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

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
• 202211
• 202305

Tested branch (Please provide the tested image version)

Description for the changelog

Link to config_db schema for YANG module changes

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

[ec-michael-shih]

@lguohan @jleveque There is a code checking tool: Semgrep。
I checked that my driver uses API: strncpy(), and semgrep recommended that I use a safer writing method: API: strncpy_s().

I used the standard modification method (reference_URL), which is basically the the same modification method on sonic-buildimage with memset_s, wrap it with
#define __STDC_WANT_LIB_EXT1__ 1
and

#ifdef __STDC_LIB_EXT1__
  ...
  strncpy_s()
  ...
#endif

But the check of this rule seems to be unable to allow me to successfully pass.
Are there any concepts you’d like to share?