[Mellanox] Update tests related to thermal control

[JibinBao]

Description of PR

Update tests related to thermal control due to the thermal control mechanism being changed for Nvidia device.

1. Update test_get_fans_target_speed, test_show_platform_fanstatus_mocked and test_show_platform_temperature_mocked
2. Remove tests/platform_tests/mellanox/test_thermal_control.py due to the case is not suitable for the new thermal control mechanism

Summary:
Fixes # (issue)

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Back port request

• 201911
• 202012
• 202205
• 202305

Approach

What is the motivation for this PR?

Update tests related to thermal control due to the thermal control mechanism being changed.

How did you do it?

Update tests related to thermal control

How did you verify/test it?

run tests related to thermal control on the image supporting new thermal control mechanism

Any platform specific information?

Any

Supported testbed topology if it's a new test case?

Any

Documentation

[mssonicbld]

Cherry-pick PR to 202305: #9667

[bingwang-ms]

@JibinBao I saw below error on my testbed. Looks like the function is_host_service_running is not defined. Can you please check?

>       if is_mellanox_device(duthost) and duthost.is_host_service_running("hw-management-tc"):

platform_tests/conftest.py:725: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
common/devices/multi_asic.py:289: in __getattr__
    return getattr(self.sonichost, attr)  # For backward compatibility
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <SonicHost str2-msn2700-spy-2>, module_name = 'is_host_service_running'

    def __getattr__(self, module_name):
        if self.host.has_module(module_name):
            self.module_name = module_name
            self.module = getattr(self.host, module_name)
    
            return self._run
>       raise AttributeError(
            "'%s' object has no attribute '%s'" % (self.__class__, module_name)
            )
E       AttributeError: '<class 'tests.common.devices.sonic.SonicHost'>' object has no attribute 'is_host_service_running'

[JibinBao]

@bingwang-ms Because this function is in the PR https://github.com/sonic-net/sonic-mgmt/pull/8712，but it is still under review.
To fix this issue, I have created one PR only for this function, can you help review it?
#9942

[bingwang-ms]

@bingwang-ms Because this function is in the PR https://github.com/sonic-net/sonic-mgmt/pull/8712，but it is still under review. To fix this issue, I have created one PR only for this function, can you help review it? #9942

Thanks! The PR #9942 is merged