[action] [PR:9075] [chassis] accomodate test_memory_exhaustion.py if random dut is chassis sup

[mssonicbld]

Description of PR

There are 2 fixes in this PR to enhance for chassis:

1. Right now in processes_utils.py when check_critical_services, we rely on what is pre-defined in inventory file, otherwise it is 300 sec, but for SUP, we should give 900sec as most SUPs have 10+ dockers that need to come back up, it should differ from linecards or any single-dut. magic 900 sec comes from experientment, where I had run twice the test, 1st time need 800+sec, 2nd time needs ~702sec
2. During memory exhaustion test, if the random selected dut is chassis SUP, we also need to check linecards bootup and critical services are up.

Summary:
Fixes # (issue)
#9087

Type of change

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

Back port request

• 201911
• 202012
• 202205

Approach

What is the motivation for this PR?

How did you do it?

How did you verify/test it?

Any platform specific information?

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

Documentation

[mssonicbld]

Original PR: #9075