perf: only clone schema once in addMocksToSchema

[grxy]

🚨 IMPORTANT: Please do not create a Pull Request without creating an issue first.

Any change needs to be discussed before proceeding. Failure to do so may result in the rejection of
the pull request.

Description

This PR adds updateResolversInPlace: true to the call to addResolversToSchema in addMocksToSchema, to prevent large schemas from being cloned twice.

Related #6198

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Screenshots/Sandbox (if appropriate/relevant):

N/A

How Has This Been Tested?

• Added a test that ensures that a new schema is always created by calls to addMocksToSchema, whether or not the resolvers argument is passed.

Test Environment:

• OS: MacOS
• @graphql-tools/mock: 9.0.2
• NodeJS: v20.10.0

Checklist:

• I have followed the
  CONTRIBUTING doc and the
  style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests and linter rules pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Further comments

See #6198 for alternatives considered.

[changeset-bot]

🦋 Changeset detected

Latest commit: b91e948

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@graphql-tools/mock	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[ardatan]

Thanks <3