Integrate AutoDismissService into IngestReportsService

What does this MR do and why?

Call AutoDismissService to automatically dismiss the ingested vulnerabilities based on the vulnerability management policies.

References

• Depends on Add AutoDismissService for auto-dismiss policies (!214068 - merged)

Screenshots or screen recordings

How to set up and validate locally

1. In rails console enable the feature flag

   Feature.enable(:auto_dismiss_vulnerability_policies)

2. Create a project
3. Create an auto-dismiss policy:

   vulnerability_management_policy:
   - name: Auto-dismiss acceptable secrets
     description: Auto-dismiss secrets
     enabled: true
     actions:
     - type: auto_dismiss
       dismissal_reason: not_applicable
     rules:
     - type: detected
       criteria:
       - type: file_path
         value: ".env"

4. Add .gitlab-ci.yml with secret detection

   include:
   - template: Jobs/Secret-Detection.latest.gitlab-ci.yml    

5. Add two secrets in the main branch:
   1. .env:

      AWS_TOKEN=AKIAZYONPI3G4JNCCWGQ

   2. .env2:

      AWS_TOKEN=AKIAZYONPI3G4JNCCWGA

6. Wait until the pipeline on main finishes
7. Open the Vulnerability Report, remove the default state filter and verify that the secret from .env got dismissed and there is an activity comment stating the details.

MR acceptance checklist

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Related to #581379