Array-enable the Database Functions

[MarkBaker]

This is:

- [ ] a bugfix
- [X] a new feature

Checklist:

• [X] Changes are covered by unit tests
• [X] Code style is respected
• [X] Commit message explains why the change is made (see https://github.com/erlang/otp/wiki/Writing-good-commit-messages)
• [ ] CHANGELOG.md contains a short summary of the change
• [ ] Documentation is updated as necessary

Why this change is needed?

Part of the Issue #2551 update to make all relevant functions array-argument-enabled

[tristanbailey]

Just a question, as this looks like it passes, is it just waiting until the package is ready to move to V2?

[MarkBaker]

Just a question, as this looks like it passes, is it just waiting until the package is ready to move to V2?

Most functions have already been array enabled (meaning that you can pass an array of values instead of a scalar argument, and get an array of results back), and merged into master. Database functions are an exception, because they're quite a bit more complicated.