fetch: limit web streams usage in body mixin methods

[mertcanaltin]

This PR aims to improve performance by optimizing the processing of webflows in the fetch module. This experiment was already done by @KhafraDev , I just opened a pr

I thought there would be discussion about it and it might benefit fetch 🚀 #2164 here is a benchmark made by @KhafraDev 🙏 benchmarks:

import { Response as UndiciResponse } from './index.js'
import { cronometro } from 'cronometro'

await cronometro({
  async 'undici Response' () {
    await new UndiciResponse('abc').text()
  },
  async 'global Response' () {
    await new Response('abc').text()
  }
})

╔═════════════════╤═════════╤═════════════════╤═══════════╗
║ Slower tests    │ Samples │          Result │ Tolerance ║
╟─────────────────┼─────────┼─────────────────┼───────────╢
║ global Response │   10000 │ 40169.19 op/sec │  ± 1.59 % ║
╟─────────────────┼─────────┼─────────────────┼───────────╢
║ Fastest test    │ Samples │          Result │ Tolerance ║
╟─────────────────┼─────────┼─────────────────┼───────────╢
║ undici Response │   10000 │ 44024.31 op/sec │  ± 2.12 % ║
╚═════════════════╧═════════╧═════════════════╧═══════════╝

[mertcanaltin]

I'm running tests, I'll fix them 🧪

[KhafraDev]

There are related failures, but I don't necessarily think this should land as-is even if those failures were fixed.

[mertcanaltin]

I wonder if you have a suggestion, if it's healthy to keep it as it is, I'll close this place @KhafraDev