feat(experimental-utils): upgrade eslint types for v7

[bradzacher]

BREAKING CHANGE:

• Renames some interfaces to be closer to the underlying ESLint definitions.
• Changes the definitions to use declare class instead of interface types so they're a little more sane.
• Marks a lot of properties as readonly
  • some because it's correct (eg context and source code)
  • some because it makes some things easier
• Removed types for APIs that have been deprecated.
  • Some had been deprecated for 3 major versions - it's time to move on.
• Removed deprecated parser options.

Added a lot of jsdoc to the types. Like a lot. Some taken from eslint's site, some taken from the source code.

[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!

---

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[codecov]

Codecov Report

Merging #2023 into v3 will decrease coverage by 0.00%.
The diff coverage is 31.57%.

@@            Coverage Diff             @@
##               v3    #2023      +/-   ##
==========================================
- Coverage   93.61%   93.61%   -0.01%     
==========================================
  Files         169      170       +1     
  Lines        7680     7679       -1     
  Branches     2195     2193       -2     
==========================================
- Hits         7190     7189       -1     
  Misses        231      231              
  Partials      259      259              

Flag	Coverage Δ
#unittest	93.61% <31.57%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
...n/src/rules/indent-new-do-not-use/OffsetStorage.ts	100.00% <ø> (ø)
packages/eslint-plugin/src/util/misc.ts	92.59% <ø> (ø)
...experimental-utils/src/eslint-utils/RuleCreator.ts	66.66% <ø> (ø)
...ages/experimental-utils/src/ts-eslint/CLIEngine.ts	0.00% <ø> (ø)
...ackages/experimental-utils/src/ts-eslint/ESLint.ts	0.00% <0.00%> (ø)
...ackages/experimental-utils/src/ts-eslint/Linter.ts	100.00% <ø> (ø)
...ges/experimental-utils/src/ts-eslint/RuleTester.ts	100.00% <ø> (+71.42%)	⬆️
...ges/experimental-utils/src/ts-eslint/SourceCode.ts	100.00% <ø> (ø)
.../experimental-utils/src/eslint-utils/RuleTester.ts	8.88% <8.33%> (-0.87%)	⬇️
packages/eslint-plugin/src/rules/array-type.ts	94.28% <100.00%> (ø)
... and 5 more