Add GraphQL fields to support migration for Vulnerability Details

Why are we doing this work

As a result of Technical Spike: Define GraphQL schema to suppo... (#343312 - closed), to support Convert the pipeline security tab to use GraphQ... (&4969 - closed).

Relevant links

Non-functional requirements

• Documentation:
• Feature flag:
• Performance:
• Testing:

Implementation plan

As part of refinement, break these down into implementation tasks and, if necessary, separate issues

 # Enums
  enum VulnerabilityEvidenceSupportingMessageName {
    RECORDED
  }
  # Types

  ## Evidence
  type VulnerabilityEvidence {
    summary: String
    supportingMessages: [VulnerabilityEvidenceSupportingMessage!]
    source: VulnerabilityEvidenceSource
    request: [VulnerabilityRequest!]
    response: [VulnerabilityResponse!]
  }

  type VulnerabilityEvidenceSupportingMessage {
    name: VulnerabilityEvidenceSupportingMessageName!
    request: [VulnerabilityRequest!]
    response: [VulnerabilityResponse!]
  }

  type VulnerabilityEvidenceSource {
    id: ID!
    name: String
    url: String
  }

  ## Evidence -- end

  type VulnerabilityRequestResponseHeader {
    name: String
    value: String
  }

  type VulnerabilityRequest {
    body: String
    method: String
    url: String
    headers: [VulnerabilityRequestResponseHeader!]
  }

  type VulnerabilityResponse {
    body: String
    statusCode: String
    reasonPhrase: String
    headers: [VulnerabilityRequestResponseHeader!]
  }

  type VulnerabilityAsset {
    name: String
    url: String
  }

  type VulnerabilityRemediation {
    diff: [String!]
  }

  ## Extensions

  # Check /ee/lib/ee/gitlab/ci/parsers/security/validators/schemas/coverage_fuzzing.json
  # for more details
  extend type VulnerabilityLocationCoverageFuzzing {
    crashType: String
    crashAddress: String
    stacktraceSnippet: String
  }

  extend type VulnerabilityScanner {
    url: String
    version: String
  }

  extend type Vulnerability {
    assets: [VulnerabilityAsset!]
    canModifyRelatedIssues: Boolean!
    createdAt: Time
    evidence: VulnerabilityEvidence
    pipeline: Pipeline
    relatedIssuesHelpPath: String
    remediations: [VulnerabilityRemediation!]
    solution: String
  }