Add dismissal data to SecurityReportFinding

What does this MR do and why?

This MR adds dismissal data to the PipelineSecurotyReportFindingType used by project.pipeline.securityReportFinding and project.pipeline.securityReportFindings.

Screenshots or screen recordings

Database

EXPLAIN SELECT "vulnerability_feedback".* FROM "vulnerability_feedback" WHERE
"vulnerability_feedback"."finding_uuid" IN (
'cb3c6229-3d3a-5245-b734-8b6b25d69337', 'a745cfcb-e813-5b61-87c3-5cd84c55cdcc',
'493cf94e-669a-53b8-82c5-44aa3019cd0d', '87e7e525-f406-5317-adb7-e042b65e4f9f',
'c9e40395-72cd-54f5-962f-e1d52c0dffab', 'b369de1c-f9e1-521f-ad7f-0586b6659369')
AND "vulnerability_feedback"."feedback_type" = 0 

https://postgres.ai/console/gitlab/gitlab-production-tunnel-pg12/sessions/14794/commands/51714

Time: 36.124 ms  
  - planning: 2.267 ms  
  - execution: 33.857 ms  
    - I/O read: 33.557 ms  
    - I/O write: 0.000 ms  
  
Shared buffers:  
  - hits: 12 (~96.00 KiB) from the buffer pool  
  - reads: 18 (~144.00 KiB) from the OS file cache, including disk I/O  
  - dirtied: 0  
  - writes: 0  

SELECT "users"."id",
       "users"."email",
       "users"."encrypted_password",
       "users"."reset_password_token",
       "users"."reset_password_sent_at",
       "users"."remember_created_at",
       "users"."sign_in_count",
       "users"."current_sign_in_at",
       "users"."last_sign_in_at",
       "users"."current_sign_in_ip",
       "users"."last_sign_in_ip",
       "users"."created_at",
       "users"."updated_at",
       "users"."name",
       "users"."admin",
       "users"."projects_limit",
       "users"."failed_attempts",
       "users"."locked_at",
       "users"."username",
       "users"."can_create_group",
       "users"."can_create_team",
       "users"."state",
       "users"."color_scheme_id",
       "users"."password_expires_at",
       "users"."created_by_id",
       "users"."last_credential_check_at",
       "users"."avatar",
       "users"."confirmation_token",
       "users"."confirmed_at",
       "users"."confirmation_sent_at",
       "users"."unconfirmed_email",
       "users"."hide_no_ssh_key",
       "users"."admin_email_unsubscribed_at",
       "users"."notification_email",
       "users"."hide_no_password",
       "users"."password_automatically_set",
       "users"."encrypted_otp_secret",
       "users"."encrypted_otp_secret_iv",
       "users"."encrypted_otp_secret_salt",
       "users"."otp_required_for_login",
       "users"."otp_backup_codes",
       "users"."public_email",
       "users"."dashboard",
       "users"."project_view",
       "users"."consumed_timestep",
       "users"."layout",
       "users"."hide_project_limit",
       "users"."note",
       "users"."unlock_token",
       "users"."otp_grace_period_started_at",
       "users"."external",
       "users"."incoming_email_token",
       "users"."auditor",
       "users"."require_two_factor_authentication_from_group",
       "users"."two_factor_grace_period",
       "users"."last_activity_on",
       "users"."notified_of_own_activity",
       "users"."preferred_language",
       "users"."email_opted_in",
       "users"."email_opted_in_ip",
       "users"."email_opted_in_source_id",
       "users"."email_opted_in_at",
       "users"."theme_id",
       "users"."accepted_term_id",
       "users"."feed_token",
       "users"."private_profile",
       "users"."roadmap_layout",
       "users"."include_private_contributions",
       "users"."commit_email",
       "users"."group_view",
       "users"."managing_group_id",
       "users"."first_name",
       "users"."last_name",
       "users"."static_object_token",
       "users"."role",
       "users"."user_type",
       "users"."static_object_token_encrypted",
       "users"."otp_secret_expires_at",
       "users"."onboarding_in_progress"
FROM   "users"
WHERE  "users"."id" = 4473655 

https://postgres.ai/console/gitlab/gitlab-production-tunnel-pg12/sessions/14794/commands/51720

Time: 30.446 ms  
  - planning: 5.789 ms  
  - execution: 24.657 ms  
    - I/O read: 24.339 ms  
    - I/O write: 0.000 ms  
  
Shared buffers:  
  - hits: 0 from the buffer pool  
  - reads: 4 (~32.00 KiB) from the OS file cache, including disk I/O  
  - dirtied: 1 (~8.00 KiB)  
  - writes: 0 

How to set up and validate locally

1. Run a pipeline on a sample project (https://gitlab.com/gitlab-examples/security/security-reports).
2. Dismiss one or more vulnerabilities

Test query on dismissed security findings and non-dismissed security findings:

query {
  project(fullPath:"<project path>") {
    pipeline(iid:"<pipeline iid>") {
      securityReportFindings(state: [DISMISSED]) {
        nodes {
          uuid
          dismissedAt
          dismissedBy {
            name
          }
          dismissalReason
          stateComment
        }
      }
    }
  }
}

Test query on non-dismissed security findings:

query {
  project(fullPath:"<project path>") {
    pipeline(iid:"<pipeline iid>") {
      securityReportFindings(state: [DETECTED]) {
        nodes {
          uuid
          dismissedAt
          dismissedBy {
            name
          }
          dismissalReason
          stateComment
        }
      }
    }
  }
}

Test query on a dismissed security finding and a non-dismissed security finding (use previous queries for examples):

query {
  project(fullPath:"<project path>") {
    pipeline(iid:"<pipeline iid>") {
      securityReportFinding(uuid:"<uuid>") {
        dismissedAt
        dismissedBy {
          name
        }
        dismissalReason
        stateComment
      }
    }
  }
}

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #387865 (closed)