fix(test): for "CI / Windows Unit Tests", skip TestSessionReconnect

[nakatani-yo]

Motivation

• The test for github.com/argoproj/argo-workflows/v4/util/sqldb in "CI / Windows Unit Tests" failed.

--- FAIL: TestSessionReconnect (16.11s)
    session_test.go:89: 
        	Error Trace:	D:/a/argo-workflows/argo-workflows/util/sqldb/session_test.go:89
        	Error:      	Received unexpected error:
        	            	run postgres: generic container: create container: ensure default network: network create: Error response from daemon: could not find plugin bridge in v1 plugin registry: plugin not found
        	Test:       	TestSessionReconnect
FAIL
coverage: 0.0% of statements

• This error "could not find plugin bridge in v1 plugin registry" indicates that the Docker daemon could not create a bridge network for Linux containers, meaning the Linux container execution infrastructure is not available in that environment. This can occur on Windows if Docker is running in Windows Containers mode, or if the bridge network driver is corrupted or disabled.

• Confirmed runs-on: windows-2022 in .github/workflows/ci-build.yaml.

• TestSessionReconnect uses the Linux-based PostgreSQL test container (postgres:17.4-alpine). On Windows CI, that assumption does not hold, which causes the test to fail for an environment-specific reason rather than due to product behavior.

For details on how to specify the test container, please refer to the following:
https://github.com/argoproj/argo-workflows/blob/main/util/sqldb/session_test.go#L30

Please refer to the following link for details regarding the supported platforms for postgres:17.4-alpine:
https://hub.docker.com/layers/library/postgres/17.4-alpine/

Modifications

• Skipped TestSessionReconnect when runtime.GOOS == "windows".
• Added the runtime import required for the platform check.

Verification

• Confirmed the change is limited to util/sqldb/session_test.go.
• Verified that TestSessionReconnect now exits early on Windows before attempting to start the Linux container image.
• Confirmed that "CI / Windows Unit Tests" completed successfully.
  • https://github.com/argoproj/argo-workflows/actions/runs/24198259870/job/70634623467

Documentation

• No documentation updates are required for this test-only change.