fix(template-webpack): use new plugin syntax

[georgexu99]

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• I agree to follow the code of conduct that this project follows, as appropriate.
• The changes are appropriately documented (if applicable).
• The changes have sufficient test coverage (if applicable).
• The testsuite passes successfully on my local machine (if applicable).

Summarize your changes:

[codecov]

Codecov Report

Merging #2990 (f4657f0) into main (362099a) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2990      +/-   ##
==========================================
- Coverage   73.80%   73.80%   -0.01%     
==========================================
  Files          66       67       +1     
  Lines        2142     2168      +26     
  Branches      424      436      +12     
==========================================
+ Hits         1581     1600      +19     
- Misses        356      361       +5     
- Partials      205      207       +2     

Impacted Files	Coverage Δ
packages/template/webpack/src/WebpackTemplate.ts	100.00% <100.00%> (ø)
packages/plugin/webpack/src/WebpackConfig.ts	94.62% <0.00%> (-4.10%)	⬇️
packages/api/core/src/util/plugin-interface.ts	31.11% <0.00%> (-0.71%)	⬇️
packages/plugin/webpack/src/WebpackPlugin.ts	37.93% <0.00%> (-0.07%)	⬇️
...kages/plugin/webpack/src/util/rendererTypeUtils.ts	100.00% <0.00%> (ø)
packages/api/core/src/api/make.ts	79.20% <0.00%> (+0.20%)	⬆️

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[VerteDinde]

Thanks!