Separating Redshift connector from Database library into a new AWS library

[radeusgd]

Pull Request Description

Related to #5777

Important Notes

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
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  Java,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• All code has been tested:
  • Unit tests have been written where possible.
  • If GUI codebase was changed, the GUI was tested when built using ./run ide build.

[radeusgd]

This PR also adds a widget to Database.connect for choosing the database type.

We currently use _ placeholders for missing required arguments to show to the user that more are needed. Ideally, we will want to use nested widgets.

[JaroslavTulach]

build.sbt changes are OK from my perspective. Just consider removing truffle-api dependencies - probably unnecessary.