Add the option of skip pre sanity check --skip_pre_sanity

[ZhaohuiS]

Description of PR

Summary:
Fixes # (issue)
If we want to enable post sanity check, we have to run pre sanity check for now, it's impossible to disable pre sanity check and enable post sanity check in current code.
Add a new option of skip pre sanity check to achieve the goal of disabling pre sanity check and enable post sanity check at same time, which is moving sanity check after test running.

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• New Test case
  • Skipped for non-supported platforms
• Test case improvement

Back port request

• 202205
• 202305
• 202311
• 202405
• 202411
• 202505
• 202511

Approach

What is the motivation for this PR?

Add a new option of skip pre sanity check to achieve the goal of disabling pre sanity check and enable post sanity check at same time, which is moving sanity check after test running.

How did you do it?

Add a new pytest option --skip_pre_sanity.

How did you verify/test it?

run test case with this new option.

04/12/2025 07:13:49 __init__.sanity_check_full               L0210 INFO   | Prepare sanity check
04/12/2025 07:13:49 __init__.sanity_check_full               L0227 INFO   | Found marker: m.name=topology, m.args=('t0', 'm0', 'mx', 't0-2vlans'), m.kwargs={}
04/12/2025 07:13:49 __init__.sanity_check_full               L0300 INFO   | Sanity check settings: skip_sanity=False, skip_pre_sanity=True, pre_check_items=['check_processes', 'check_interfaces', 'check_bgp', 'check_dbmemory', 'check_monit', 'check_secureboot', 'check_ipv4_mgmt', 'check_ipv6_mgmt', 'check_orchagent_usage'], allow_recover=False, recover_method=adaptive, post_check=True, post_check_items=['check_processes', 'check_interfaces', 'check_bgp', 'check_dbmemory', 'check_monit', 'check_secureboot', 'check_ipv4_mgmt', 'check_ipv6_mgmt', 'check_orchagent_usage']
04/12/2025 07:13:49 __init__.sanity_check_full               L0340 INFO   | No pre-test sanity check item, skip pre-test sanity check.

Any platform specific information?

all platforms.

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

Documentation

[mssonicbld]

/azp run

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