fix auto-incremented columns marked as required fields

[EmrysMyrddin]

Description

The MySQL handler was marking auto-incremented columns as required fields in the GraphQL schema.
It's wrong since you can provide NULL or omit auto-incremented fields even if they are marked as NOT NULL.
It was also marking as required fields NOT NULL columns with defined default, which is wrong for the same reason.

Fixes #5350
Fixes #2182

Type of change

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

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Latest commit: 9a0afe6

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🚀 Snapshot Release (alpha)

The latest changes of this PR are available as alpha on npm (based on the declared changesets):

Package	Version	Info
@graphql-mesh/mysql	0.95.3-alpha-20230831153203-5d505abed	npm ↗︎ unpkg ↗︎