add @serverless/utils dependency

[cnuss]

Description

Fixes build errors during CI/CD

Motivation and Context

Got errors during CI/CD, must be related to serverless@4 release...

Run npm run lint

> [email protected] lint
> eslint .


/Users/runner/work/serverless-offline/serverless-offline/src/lambda/RuntimeServer.js
  3:1  error  '@serverless/utils' should be listed in the project's dependencies. Run 'npm i -S @serverless/utils' to add it  import/no-extraneous-dependencies

/Users/runner/work/serverless-offline/serverless-offline/src/lambda/handler-runner/bootstrap-runner/BootstrapRunner.js
  3:1  error  '@serverless/utils' should be listed in the project's dependencies. Run 'npm i -S @serverless/utils' to add it  import/no-extraneous-dependencies

How Has This Been Tested?

Ran CI/CD