feat(eslint-plugin): [await-thenable] added suggestion fixer

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes Enhancement: [await-thenable] Add a suggestion fixer #6235
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

Adds a suggestion fixer to remove await from the beginning of the AwaitExpression.

While I was in the area, split up the invalid test cases (#6887).

[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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• Node 20 - nx run repo-tools:postinstall-script
• Node 20 - nx test visitor-keys
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[codecov]

Codecov Report

Merging #7437 (73d4a8c) into main (0a1de14) will decrease coverage by 0.19%.
Report is 76 commits behind head on main.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7437      +/-   ##
==========================================
- Coverage   87.41%   87.23%   -0.19%     
==========================================
  Files         381      387       +6     
  Lines       13321    13404      +83     
  Branches     3938     3962      +24     
==========================================
+ Hits        11645    11693      +48     
- Misses       1298     1327      +29     
- Partials      378      384       +6     

Flag	Coverage Δ
unittest	87.23% <100.00%> (-0.19%)	⬇️

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

Files Changed	Coverage Δ
packages/eslint-plugin/src/rules/await-thenable.ts	100.00% <100.00%> (ø)

... and 22 files with indirect coverage changes