Add ignore config to `no-unused-fields` rule

[maciesielka]

Description

Changes here add a ignoredFieldSelectors configuration to the no-unused-fields rule such that some fields are allowed to be unused.

Fixes #2280

Type of change

Please delete options that are not relevant.

• [x] New feature (non-breaking change which adds functionality)

Checklist:

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

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 0a2deaa83a39c8b849341357a1c22f86a16b33ed

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

This PR includes changesets to release 1 package

| Name | Type | | ----------------------------- | ----- | | @graphql-eslint/eslint-plugin | Major |

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