deps: remove rustls-pemfile

[Frando]

Description

rustls-pemfile is unmaintained.

This removes our direct dependencies of rustls-pemfile by replacing with equivalents via rustls-pki-types.

However this does not yet remove rustls-pemfile completly:

• We need to update axum-server to 0.8 in iroh-dns-server: Depends on merge and release of deps: bump axum-server tokio-rustls-acme#37
• rustls-pemfile is used by rustls-cert-file-reader: I filed deps: remove rustls-pemfile MOZGIII/rustls-cert-utils#22

Fixes #3746

Breaking Changes

Notes & open questions

Change checklist

• Self-review.
• Documentation updates following the style guide, if relevant.
• Tests if relevant.
• All breaking changes documented.
  • List all breaking changes in the above "Breaking Changes" section.
  • Open an issue or PR on any number0 repos that are affected by this breaking change. Give guidance on how the updates should be handled or do the actual updates themselves. The major ones are:
    • quic-rpc
    • iroh-gossip
    • iroh-blobs
    • dumbpipe
    • sendme

[github-actions]

Documentation for this PR has been generated and is available at: https://n0-computer.github.io/iroh/pr/3747/docs/iroh/

Last updated: 2025-12-08T12:30:53Z

[github-actions]

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Last updated for commit: d722f7a