feat: remove meta.docs.category from rules

[MichaelDeBoey]

@bradzacher Not sure if wanted to remove it from all rules or only from the extended core rules, so went with the latter (for now).
Types will be less complex if we remove it on all rules though.

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Part of #3738

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[bradzacher]

let's just remove it from everywhere.
they've removed it from core so let's remove it from the types too.
no point fragmenting the ecosystem.

[MichaelDeBoey]

@bradzacher Removed the category from all rules now

[codecov]

Codecov Report

Merging #3800 (44b97b4) into v5 (ea6a97c) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##               v5    #3800      +/-   ##
==========================================
- Coverage   92.55%   92.55%   -0.01%     
==========================================
  Files         325      323       -2     
  Lines       11247    11240       -7     
  Branches     3174     3174              
==========================================
- Hits        10410    10403       -7     
  Misses        384      384              
  Partials      453      453              

Flag	Coverage Δ
unittest	92.55% <ø> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...gin-internal/src/rules/no-poorly-typed-ts-props.ts	88.88% <ø> (ø)
...internal/src/rules/no-typescript-default-import.ts	100.00% <ø> (ø)
...-internal/src/rules/no-typescript-estree-import.ts	87.50% <ø> (ø)
...lugin-internal/src/rules/plugin-test-formatting.ts	81.75% <ø> (ø)
...plugin-internal/src/rules/prefer-ast-types-enum.ts	90.00% <ø> (ø)
...t-plugin/src/rules/adjacent-overload-signatures.ts	93.33% <ø> (ø)
packages/eslint-plugin/src/rules/array-type.ts	98.61% <ø> (ø)
packages/eslint-plugin/src/rules/await-thenable.ts	100.00% <ø> (ø)
packages/eslint-plugin/src/rules/ban-ts-comment.ts	95.65% <ø> (ø)
...ages/eslint-plugin/src/rules/ban-tslint-comment.ts	100.00% <ø> (ø)
... and 114 more

[bradzacher]

LGTM - thanks!