Turbo loader options type too strict

[Netail]

Link to the code that reproduces this issue

https://github.com/Netail/repro-typescript-next-config

To Reproduce

1. Install dependencies; yarn install
2. Inspect next.config.ts
3. Svgr options clash with turbo options type

Current vs. Expected behavior

The turbo loader options type are a bit too strict compared to what's allowed by e.g. the SVGR plugin options

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.1.0: Thu Oct 10 21:03:15 PDT 2024; root:xnu-11215.41.3~2/RELEASE_ARM64_T6000
  Available memory (MB): 32768
  Available CPU cores: 10
Binaries:
  Node: 22.11.0
  npm: 10.9.0
  Yarn: 1.22.22
  pnpm: 9.6.0
Relevant Packages:
  next: 15.1.3 // Latest available version is detected (15.1.3).
  eslint-config-next: N/A
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.7.2
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

TypeScript

Which stage(s) are affected? (Select all that apply)

next dev (local)

Additional context

No response