fix: fix error message on invalid plugin options

[alexander-akait]

What kind of change does this PR introduce?

bugfix

Did you add tests for your changes?

yes

If relevant, did you update the documentation?

No need

Summary

We should not output error stack for validation errors inside plugins

Does this PR introduce a breaking change?

No

Other information

No

[codecov]

Codecov Report

Merging #2380 (c1fbfbe) into master (311bae3) will increase coverage by 0.02%.
The diff coverage is 90.00%.

@@            Coverage Diff             @@
##           master    #2380      +/-   ##
==========================================
+ Coverage   70.50%   70.52%   +0.02%     
==========================================
  Files          47       47              
  Lines        2156     2158       +2     
  Branches      561      563       +2     
==========================================
+ Hits         1520     1522       +2     
  Misses        636      636              

Impacted Files	Coverage Δ
packages/serve/src/index.ts	84.21% <0.00%> (ø)
packages/webpack-cli/lib/webpack-cli.js	91.27% <100.00%> (+0.02%)	⬆️

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[snitin315]

Looks good to me 🚀 .