fix(eslint-plugin): [no-unused-expressions] handle ternary and short-circuit options

[yeonjuan]

Fixes #1764 😁

[typescript-eslint]

Thanks for the PR, @yeonjuan!

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 #2194 into master will decrease coverage by 0.00%.
The diff coverage is 90.00%.

@@            Coverage Diff             @@
##           master    #2194      +/-   ##
==========================================
- Coverage   93.42%   93.41%   -0.01%     
==========================================
  Files         173      173              
  Lines        7861     7868       +7     
  Branches     2242     2246       +4     
==========================================
+ Hits         7344     7350       +6     
- Misses        245      246       +1     
  Partials      272      272              

Flag	Coverage Δ
#unittest	93.41% <90.00%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
...s/eslint-plugin/src/rules/no-unused-expressions.ts	94.11% <90.00%> (-5.89%)	⬇️

[bradzacher]

LGTM - thanks for this!