Fix grant and revoke for Redshift grantees with special characters

[mp24-git]

resolves dbt-labs/dbt-core#277 and addresses dbt-labs/dbt-adapters#156 for Redshift

Description

Grantees in the grant and revoke SQL commands in Redshift can be quoted using double quotes. This avoids issues with user names that contain special characters such as . or : (in case of IAM role grants).

Checklist

• I have read the contributing guide and understand what's expected of me
• I have signed the CLA
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• I have opened an issue to add/update docs, or docs changes are not required/relevant for this PR
• I have run changie new to create a changelog entry

[mp24-git]

I have tested it with "normal" users for the grant and revoke workflows. I have also tested this for IAMR: based users based on the issue dbt-labs/dbt-core#277

[github-actions]

This PR has been marked as Stale because it has been open with no activity as of late. If you would like the PR to remain open, please comment on the PR or else it will be closed in 7 days.

[github-actions]

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