add more info to the getPolyfills function

[EvanBacon]

Summary

We use getPolyfills in Expo CLI to supply custom global setup for Node.js environments. Currently, these polyfills are applied to bundles for both client and server web environments. This PR would supply additional info that we can use to pick polyfills.

Test plan

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (3be0f8f) 83.39% compared to head (77e7301) 83.39%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1071   +/-   ##
=======================================
  Coverage   83.39%   83.39%           
=======================================
  Files         209      209           
  Lines       10835    10835           
  Branches     2725     2725           
=======================================
  Hits         9036     9036           
  Misses       1799     1799           

Files Changed	Coverage Δ
packages/metro/src/lib/getPrependedScripts.js	100.00% <ø> (ø)

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@robhogan has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[robhogan]

Sorry about the delay with this one. At first glance it seems a bit arbitrary to add customTransformOptions to this (and not other config), but it's a valid use case and fits with future extensions, so I think we can get this in.

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@robhogan has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.