Support for Redshift Serverless

[winglot]

Based on the work and comments from #82.

TODO: schema tests do not pass on Redshift Serverless since the quota parameter is ignored.

[winglot]

Seems like AWS made some changes to Redshift Serverless since last week and more tests are now failing. It has something to do with how case-insensitive identifiers are handled. I have case sensitivity disabled on my playground serverless and provisioned redshift clusters and running the same set of tests, they fail on serverless failing to find users/schemas where we pass random casing.

[StevenKGER]

Hey @winglot,
I'm really interested in this change and PR. What do you mean by...?

I have case sensitivity disabled on my playground serverless and provisioned redshift clusters and running the same set of tests, they fail on serverless failing to find users/schemas where we pass random casing.

I don't see failed checks etc. (as they were executed 7 months ago) - where could you need support exactly and what is your working progress where other people could start?

[mmichaelb]

Same here. I would love to have this feature implemented as we currently cannot use this provider to manage our Redshift Serverless Instance. Again, if you need any support/contribution, feel free to share your progress and I am/we are happy to help.