Add lastUsedIps field to PersonalAccessToken GraphQL type

What does this MR do and why?

References

[BE] New GraphQL query to fetch list of all cre... (#572948).

Screenshots or screen recordings

How to set up and validate locally

1. Login with any user
2. In Rails console create personal access tokens for the user with last_used_ips

   $ rails c
   > user = User.find(<user_id>)
   > FactoryBot.create(:personal_access_token, :with_last_used_ips, user: user)

3. Go to http://localhost:3000/-/graphql-explorer and run the following query

   query {
     user(id: "gid://gitlab/User/<user_id>") {
       personalAccessTokens {
         nodes {
           name
           lastUsedIps
         }
       }
     }
   }

4. Verify that lastUsedIps field has values

MR acceptance checklist

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