fix pruning of directive arg type

[dimatill]

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Description

Related #4693

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Screenshots/Sandbox (if appropriate/relevant):

Adding links to sandbox or providing screenshots can help us understand more about this PR and take action on it as appropriate

How Has This Been Tested?

Tests are included in PR

Test Environment:

• OS: macOS Monterey v12.4
• @graphql-tools/utils: 8.10.1
• NodeJS: v16.15.1

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

Some tests currently failing on the master branch on my machine. No new failing tests added

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[changeset-bot]

🦋 Changeset detected

Latest commit: 0118e1a

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

This PR includes changesets to release 28 packages

Name	Type
@graphql-tools/utils	Patch
@graphql-tools/batch-delegate	Patch
@graphql-tools/batch-execute	Patch
@graphql-tools/delegate	Patch
@graphql-tools/graphql-tag-pluck	Patch
@graphql-tools/import	Patch
@graphql-tools/links	Patch
@graphql-tools/load	Patch
@graphql-tools/merge	Patch
@graphql-tools/mock	Patch
@graphql-tools/node-require	Patch
@graphql-tools/relay-operation-optimizer	Patch
@graphql-tools/resolvers-composition	Patch
@graphql-tools/schema	Patch
@graphql-tools/stitch	Patch
@graphql-tools/stitching-directives	Patch
@graphql-tools/wrap	Patch
@graphql-tools/apollo-engine-loader	Patch
@graphql-tools/code-file-loader	Patch
@graphql-tools/git-loader	Patch
@graphql-tools/github-loader	Patch
@graphql-tools/graphql-file-loader	Patch
@graphql-tools/json-file-loader	Patch
@graphql-tools/module-loader	Patch
@graphql-tools/prisma-loader	Patch
@graphql-tools/url-loader	Patch
graphql-tools	Patch
federation-benchmark	Patch

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[vercel]

@dimatill is attempting to deploy a commit to the The Guild Team on Vercel.

A member of the Team first needs to authorize it.

[ardatan]

Thanks @dimatill !