[core] GraphQL: Skip prompts in non-interactive/CI environment

[rexxars]

Type of change (check at least one)

• 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)
• Documentation (fix or update to documentation)
• Maintenance
• Other, please describe:

Does this change require a documentation update? (Check one)

• Yes
• No

Current behavior

When you run sanity graphql deploy in a CI or non-interactive prompt (eg sanity graphql deploy | grep foo), it will stall because of prompts waiting for an answer (do you want a playground? do you want to proceed despite dangerous changes?).

Description

This PR checks for CI/non-interactive environments and skips the prompts if true:

• The playground prompt defaults to the current state (if there is one currently deployed) and falls back to true otherwise
• Mismatch in GraphQL generation throws an error (unless --force)
• Dangerous/breaking changes throws an error (unless --force)

There's a slight change in behavior for interactive environments, too: for the playground prompt, it defaults to the current value. I think that's better than explicitly having to answer "no" each time you deploy.

Note for release

• Skip prompts on sanity graphql deploy in non-interactive environments

Checklist

• I have read the Contributing Guidelines
• The PR title includes a link to the relevant issue
• The PR title is appropriately formatted: [some-package] PR title (#123)
• The code is linted
• The test suite is passing
• Corresponding changes to the documentation have been made

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[saasen]

LGTM!