Preset: resolve absolute path

[staff0rd]

Developing presets locally fails without this change.

The change is similar to what is already being done in getPluginByName

Without this change

Config:

schema: "https://api.spacex.land/graphql"
generates:
  generated/src:
    preset: dist/my-preset.js

Error on generate:

Unable to find preset matching 'dist/my-preset.js'
    Install one of the following packages:


    - @graphql-codegen/dist/my-preset.js
    - @graphql-codegen/dist/my-preset.js-preset
    - dist/my-preset.js

    Error: Unable to find preset matching dist/my-preset.js
        at getPresetByName (/Users/staffordwilliams/git/graphql-code-generator/packages/graphql-codegen-cli/dist/bin.js:405:11)
        at processTicksAndRejections (internal/process/task_queues.js:93:5)
        at async /Users/staffordwilliams/git/graphql-code-generator/packages/graphql-codegen-cli/dist/bin.js:968:47
        at async Task.task (/Users/staffordwilliams/git/graphql-code-generator/packages/graphql-codegen-cli/dist/bin.js:797:17)
    Error: Unable to find preset matching dist/my-preset.js
        at getPresetByName (/Users/staffordwilliams/git/graphql-code-generator/packages/graphql-codegen-cli/dist/bin.js:405:11)
        at processTicksAndRejections (internal/process/task_queues.js:93:5)
        at async /Users/staffordwilliams/git/graphql-code-generator/packages/graphql-codegen-cli/dist/bin.js:968:47
        at async Task.task (/Users/staffordwilliams/git/graphql-code-generator/packages/graphql-codegen-cli/dist/bin.js:797:17)

[changeset-bot]

🦋 Changeset detected

Latest commit: 0eaa477

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

This PR includes changesets to release 2 packages

Name	Type
@graphql-codegen/cli	Patch
@graphql-cli/codegen	Patch

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[charlypoly]

Hi @staff0rd,

Thank you for your contribution! ⚡