chore(datastore): remove tslint and enable eslint

[HuiSF]

Description of changes

Details see commit messages in this PR.

E2E test run against the changes included in this PR: https://github.com/aws-amplify/amplify-js/actions/runs/8900079676

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• [x] PR description included
• [x] yarn test passes
• [ ] Tests are changed or added
• [ ] Relevant documentation is changed or added (and PR referenced)

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