fix: gateway conformance tests

[SgtPooki]

• fix: fixture loading
• fix: bug with parsing certain content

Title

fix: gateway conformance tests

Description

Fixes https://github.com/ipfs/helia-verified-fetch/issues/79

Notes & open questions

Note: there are infinite loops occurring on some gateway conformance tests, and I have disabled them for now.

Change checklist

• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation if necessary (this includes comments as well)
• [ ] I have added tests that prove my fix is effective or that my feature works

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:tada: This PR is included in version 1.0.1 :tada:

The release is available on npm package (@latest dist-tag)

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[github-actions[bot]]

:tada: This PR is included in version 1.4.2 :tada:

The release is available on npm package (@latest dist-tag)

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[github-actions[bot]]

:tada: This PR is included in version 1.24.0 :tada:

The release is available on npm package (@latest dist-tag)

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[github-actions[bot]]

:tada: This PR is included in version 1.0.0 :tada:

The release is available on GitHub release

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