feat(core): add platform and arch to generateAssets hook parameters

[timfish]

• I have read the contribution documentation for this project.
• 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).

This adds platform and arch parameters to the generateAssets hook so it can be used to generate or copy native assets.

{
  hooks: {
    generateAssets: async (config: ForgeConfig, platform: string, arch: string) => {
      console.log('We should generate some assets here');
    }
  }
}

[codecov]

Codecov Report

Merging #2327 (f6ef2bd) into master (bcb8894) will decrease coverage by 2.43%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #2327      +/-   ##
==========================================
- Coverage   75.54%   73.11%   -2.44%     
==========================================
  Files          74       74              
  Lines        2200     2198       -2     
  Branches      413      415       +2     
==========================================
- Hits         1662     1607      -55     
+ Misses        422      418       -4     
- Partials      116      173      +57     

Impacted Files	Coverage Δ
packages/api/core/src/api/start.ts	65.43% <33.33%> (-21.91%)	⬇️
packages/api/core/src/api/package.ts	74.73% <100.00%> (ø)
packages/api/core/src/api/publish.ts	69.73% <0.00%> (-22.37%)	⬇️
packages/api/core/src/api/install.ts	78.20% <0.00%> (-16.67%)	⬇️
packages/api/core/src/api/make.ts	81.72% <0.00%> (-6.58%)	⬇️
packages/api/core/src/api/init.ts	91.17% <0.00%> (-5.89%)	⬇️
packages/api/core/src/util/rebuild.ts	92.85% <0.00%> (ø)
packages/api/core/src/util/upgrade-forge-config.ts	96.42% <0.00%> (+1.69%)	⬆️
packages/installer/darwin/src/InstallerDarwin.ts	33.33% <0.00%> (+1.75%)	⬆️
... and 1 more

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