feat(eslint-plugin): add no-unnecessary-type-constraint rule

[JoshuaKGoldberg]

Fixes #2107.

If a type parameter inside a type parameter declaration includes a constraint and that constraint includes the Any or Unknown flag, that's an error.

[typescript-eslint]

Thanks for the PR, @JoshuaKGoldberg!

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!

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[codecov]

Codecov Report

Merging #2516 into master will decrease coverage by 0.06%.
The diff coverage is 91.78%.

@@            Coverage Diff             @@
##           master    #2516      +/-   ##
==========================================
- Coverage   92.81%   92.75%   -0.07%     
==========================================
  Files         290      296       +6     
  Lines        9453     9739     +286     
  Branches     2647     2733      +86     
==========================================
+ Hits         8774     9033     +259     
- Misses        322      332      +10     
- Partials      357      374      +17     

Flag	Coverage Δ
#unittest	92.75% <91.78%> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/eslint-plugin/src/configs/all.ts	100.00% <ø> (ø)
...int-plugin/src/rules/consistent-type-assertions.ts	86.48% <ø> (ø)
...nt-plugin/src/rules/lines-between-class-members.ts	85.71% <ø> (ø)
...-plugin/src/rules/no-unnecessary-type-assertion.ts	97.10% <ø> (ø)
...plugin/src/rules/prefer-string-starts-ends-with.ts	97.86% <ø> (ø)
...ges/experimental-utils/src/ts-eslint/RuleTester.ts	100.00% <ø> (ø)
packages/eslint-plugin/src/rules/dot-notation.ts	84.21% <66.66%> (-2.46%)	⬇️
...ackages/eslint-plugin/src/rules/no-implied-eval.ts	93.75% <66.66%> (-2.81%)	⬇️
.../eslint-plugin/src/rules/method-signature-style.ts	87.20% <78.04%> (-5.65%)	⬇️
...es/eslint-plugin/src/rules/no-use-before-define.ts	92.50% <80.00%> (-1.87%)	⬇️
... and 33 more

[bradzacher]

the logic itself LGTM - a few minor comments.
Thanks for working on this

[bradzacher]

one last minor comment then we're good to go!