Default state filter to confirmed and detected

What does this MR do?

Related to #217472 (closed)

In the new Security Dashboard using Standalone Vulnerabilities, dismissed vulnerabilities are now displayed by default, while in the previous version of the dashboard, they were hidden by default. It creates a lot of noise, and users will be confused about this new behavior.

To solve this, this MR redirects the user to a default state when no filters are selected at page load.

How to test this

1. You'll need an EE license.
2. Once you have it, go to your security dashboard by clicking on top nav More > Security
3. If you have the security dashboard configured you should be redirected a default state with CONFIRMED and DETECTED states preselected for you.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team