Update UpdateSecurityPolicyDismissals to handle hash licenses

What does this MR do and why?

This MR fixes a bug in the UpdateSecurityPolicyDismissals. Previously, the code assumed license objects were Hashie::Mash with a .name method, but sometimes licenses are stored as hash data structures instead.

The fix uses hash syntax (license[:name]) to extract the license name and handle both cases properly.

This MR also adds a unit test to verify that when a license has an unknown name in hash format, the system correctly skips updating the policy dismissal rather than throwing a "NoMethodError".

References

logs(internal-only)

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