Vapor: 4.57.0 Release

This patch was authored by @AndreYonadam and released by @0xTim.

This adds the ability to perform asynchronous work in the beforeRequest and afterResponse closures in XCTVapor.

E.g.

try await app.test(.GET, "/hello", beforeRequest: { req async throws in
  let currentUsersCount = try await User.query(on: app.db).count()
}, afterResponse: { res async throws in
  let newUsersCount = try await User.query(on: app.db).count()
})