SHIELD-1626 Turbolift to remove .snyk files

[AliceMEd]

This PR was created to remove your .snyk file from your repository following the activation of GHAS across github cloud. See Slack for more details.
By approving this PR, you are confirming that you have adequately and effectively reviewed this change.

How this change was made

All Repos in the Skyscanner org with a .snyk file at their base were selected.

gh api graphql \
  -f org='Skyscanner' \
  -f query='
query($org: String!, $endCursor: String) {
  organization(login: $org) {
    repositories(first: 100, after: $endCursor, orderBy: {field: NAME, direction: ASC}) {
      nodes {
        nameWithOwner
        isArchived
        object(expression: "HEAD:.snyk") { __typename }
      }
      pageInfo { hasNextPage endCursor }
    }
  }
}
' \
  --paginate \
  --jq '.data.organization.repositories.nodes[]
        | select(.isArchived==false and .object != null)
        | .nameWithOwner' \
  | sort -u > repos.txt

_{This PR was generated using turbolift.}

[Copilot]

Pull Request Overview

This PR removes the .snyk file from the repository as part of Skyscanner's migration from Snyk to GitHub Advanced Security (GHAS). The change is part of an organization-wide cleanup effort following GHAS activation.

• Removes the entire .snyk configuration file containing vulnerability patches and ignore rules
• Eliminates Snyk-specific patches for lodash vulnerability SNYK-JS-LODASH-567746
• Cleans up deprecated security tooling configuration

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}