refactor: adapt tests to use InsecureTLS()

[cgrinds]

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[Copilot]

Pull request overview

This PR refactors integration tests to use the Poller.InsecureTLS() helper rather than directly reading UseInsecureTLS, aligning tests with the current Poller configuration model (where UseInsecureTLS is a pointer and “unset” must be handled).

Changes:

• Replace poller.UseInsecureTLS with poller.InsecureTLS() when configuring tls.Config.InsecureSkipVerify across several integration tests.
• Standardize integration tests on the same TLS decision logic used elsewhere in the codebase.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
integration/test/volume_test.go	Switch TLS skip-verify flag to poller.InsecureTLS()
integration/test/snapshot_test.go	Switch TLS skip-verify flag to poller.InsecureTLS()
integration/test/snapshot_policy_test.go	Switch TLS skip-verify flag to poller.InsecureTLS()
integration/test/qos_volume_test.go	Switch TLS skip-verify flag to poller.InsecureTLS()
integration/test/igroup_test.go	Switch TLS skip-verify flag to poller.InsecureTLS()
integration/test/dns_test.go	Switch TLS skip-verify flag to poller.InsecureTLS()
integration/test/cluster_test.go	Switch TLS skip-verify flag to poller.InsecureTLS()

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