fix(llm): escape path when using bedrock inference profiles

[muscionig]

Summary

This PR attempts to fix issue #14309 by properly handling URL encoding in AWS SigV4 authentication. Specifically:

• Escapes the model.name if an ARN is identified.
• It sets the canonicalURI with the proper escaping for the signer.
• Current behavior is maintained in the case model.name is not an ARN.

I have tested this e2e.

Please let me know if this approach is acceptable. If not, feel free to close this PR.

Checklist

• The Pull Request has tests
• A changelog file has been created under changelog/unreleased/kong or skip-changelog label added on PR if changelog is unnecessary. README.md
• There is a user-facing docs PR against https://github.com/Kong/docs.konghq.com - PUT DOCS PR HERE

Issue reference

Fix #14309

[CLAassistant]

All committers have signed the CLA.

[oowl]

Hey @muscionig, Thank you for your incredible contribution. We have merged your commit in https://github.com/Kong/kong-ee/commit/4da8ac49891bbcae88e86914667514ffd7fe4d86 in another PR, so I choose to close your PR now.

[gitbrad]

Did this make it to 3.9.1? I have no visibility into the link provided. But I do think this is still present in version 3.9.1, FYSA.