healthchecks : Reduce Network Check request max time.

[franciscovalentecastro]

Description

The recent execution of the TestNetworkHealthCheck show that the Startup Checks take 7/8 minutes to complete when a Firewall is blocking egress attempts to connect. This is due to every request, 5 in total, in Network Check take at most 1 minute (with exponential backoff added in #1376) and API Check now (#1433) has a one retry after 6 sec of a failure.

Reducing max request time in Network Check to 30 secs.

Sample of log showing 7 minute difference when first Startup Check result shows

Oct 02 16:03:06 github-test-20231002-cb925-c9115a6e-d2a9-4b5f-9628-d11bab79b502 google_cloud_ops_agent_engine[1929]:         processors: [metrics_filter]
Oct 02 16:10:26 github-test-20231002-cb925-c9115a6e-d2a9-4b5f-9628-d11bab79b502 google_cloud_ops_agent_engine[1929]: 2023/10/02 16:10:26 [Ports Check] Result: PASS
Oct 02 16:10:26 github-test-20231002-cb925-c9115a6e-d2a9-4b5f-9628-d11bab79b502 google_cloud_ops_agent_engine[1929]: 2023/10/02 16:10:26 [Network Check] Result: FAIL, Error code: LogApiConnErr, Failure: Request to Logging API failed., Solution: Check your internet connection and firewall rules., Resource: https://cloud.google.com/logging/docs/agent/ops-agent/troubleshooting

Related issue

How has this been tested?

The resulting time of the TestNetworkHealthCheck.

Checklist:

• Unit tests
  • Unit tests do not apply.
  • Unit tests have been added/modified and passed for this PR.
• Integration tests
  • Integration tests do not apply.
  • Integration tests have been added/modified and passed for this PR.
• Documentation
  • This PR introduces no user visible changes.
  • This PR introduces user visible changes and the corresponding documentation change has been made.
• Minor version bump
  • This PR introduces no new features.
  • This PR introduces new features, and there is a separate PR to bump the minor version since the last release already.
  • This PR bumps the version.

[franciscovalentecastro]

Now the TestNetworkHealthCheck takes 5 minutes :

Oct 02 17:47:07 github-test-20231002-672a8-b98af40d-444f-4851-885b-d82d6c6ffa38 google_cloud_ops_agent_engine[1943]:         processors: [metrics_filter]
Oct 02 17:52:27 github-test-20231002-672a8-b98af40d-444f-4851-885b-d82d6c6ffa38 google_cloud_ops_agent_engine[1943]: 2023/10/02 17:52:27 [Ports Check] Result: PASS
Oct 02 17:52:27 github-test-20231002-672a8-b98af40d-444f-4851-885b-d82d6c6ffa38 google_cloud_ops_agent_engine[1943]: 2023/10/02 17:52:27 [Network Check] Result: FAIL, Error code: LogApiConnErr, Failure: Request to Logging API failed., Solution: Check your internet connection and firewall rules., Resource: https://cloud.google.com/logging/docs/agent/ops-agent/troubleshooting