feat: suggestion types, suggestions for no-explicit-any

[bradzacher]

Fixes #1249

I wanted to add an example usage at the same time.
no-explicit-any seemed like a good candidate because it's not possible to explicitly fix to this.
Suggestions are the perfect use case for it!

[typescript-eslint]

Thanks for the PR, @bradzacher!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

---

🙏 Please, if you or your company is finding typescript-eslint valuable, help us sustain the project by sponsoring it transparently on https://opencollective.com/typescript-eslint. As a thank you, your profile/company logo will be added to our main README which receives thousands of unique visitors per day.

[codecov]

Codecov Report

Merging #1250 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1250      +/-   ##
==========================================
+ Coverage   94.28%   94.29%   +<.01%     
==========================================
  Files         126      126              
  Lines        5393     5395       +2     
  Branches     1517     1517              
==========================================
+ Hits         5085     5087       +2     
  Misses        176      176              
  Partials      132      132

Impacted Files	Coverage Δ
...ges/experimental-utils/src/ts-eslint/RuleTester.ts	0% <ø> (ø)	⬆️
...ackages/eslint-plugin/src/rules/no-explicit-any.ts	100% <100%> (ø)	⬆️

[platinumazure]

This is really awesome! I'm excited to see real-world usage of the suggestions feature in a major plugin.