Increase time interval to retrieve snmp facts

[Janetxxx]

Description of PR

Summary:
Fixes # (issue)

Type of change

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

Back port request

• 202012
• 202205
• 202305
• 202311
• 202405

Approach

What is the motivation for this PR

Resolve flaky test when running tests/snmp/test_snmp_phy_entity.py, it couldn't retrieve transceiver dom sensor info for all ports in time when running multiple test modules all at once.

How did you do it?

Increase default wait timeout from 300s to 500s, increase default check interval from 10s to 20s.

How did you verify/test it?

Validate it in the internal setup

=========================== short test summary info ============================
SKIPPED [1] snmp/test_snmp_phy_entity.py:370: Not supported on non supervisor node
SKIPPED [1] platform_tests/thermal_control_test_helper.py:123: No mocker defined for this platform x86_64-arista_7060x6_64pe
SKIPPED [1] snmp/test_snmp_phy_entity.py:644: At least 2 PSUs required for rest of the testing in this case
============= 4 passed, 3 skipped, 1 warning in 330.68s (0:05:30) ==============

Any platform specific information?

str3-7060x6-64pe-1

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

t0-standalone-32

Documentation

[Janetxxx]

@wangxin Could you please help to merge it? Thanks!

[wangxin]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[Pterosaur]

/azp run

[azure-pipelines]

Commenter does not have sufficient privileges for PR 15041 in repo sonic-net/sonic-mgmt

[Pterosaur]

/azpw run