docs: remove remaining bluebird references

[SimonSchick]

Pull Request check-list

Please make sure to review and check all of these items:

• Does npm run test or npm run test-DIALECT pass with this change (including linting)?
• Does the description below contain a link to an existing issue (Closes #[issue]) or a description of the issue you are solving?
• Have you added new tests to prevent regressions?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?
• Did you update the typescript typings accordingly (if applicable)?
• Did you follow the commit message conventions explained in CONTRIBUTING.md?

Description of change

• Removes bluebird references from docs
• Removes bluebird typings
• Cleans up some unused imports in typings where bluebird was removed

[SimonSchick]

Oh look the flaky row locking test again >.>

[sushantdhiman]

Oh look the flaky row locking test again >.>

Yes annoying

[codecov]

Codecov Report

Merging #12167 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #12167   +/-   ##
=======================================
  Coverage   96.34%   96.34%           
=======================================
  Files          95       95           
  Lines        9190     9190           
=======================================
  Hits         8854     8854           
  Misses        336      336           

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