ref(litellm): Revert input truncation

[alexander-alderman-webb]

Description

Revert #4973

Issues

Reminders

• Please add tests to validate your changes, and lint your code using tox -e linters.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

---

New Features ✨

• (ci) Cancel in-progress PR workflows on new commit push by joshuarli in #5994
• Send GenAI spans as V2 envelope items by alexander-alderman-webb in #6079

Bug Fixes 🐛

• (google_genai) Redact binary data in inline_data and fix multi-part message extraction by ericapisani in #5977
• (profiler) Stop nulling buffer on teardown by ericapisani in #6075

Internal Changes 🔧

Google Genai

• Revert input truncation by alexander-alderman-webb in #6111
• Revert input transformation by alexander-alderman-webb in #6105

Litellm

• Revert input truncation by alexander-alderman-webb in #6112

• Revert input transformation by alexander-alderman-webb in #6107

Pydantic Ai

• Revert input truncation by alexander-alderman-webb in #6106
• Remove dead Model.request patch by alexander-alderman-webb in #5956

Other

• (ai) Revert binary blob truncation by alexander-alderman-webb in #6110
• (anthropic) Revert input transformation by alexander-alderman-webb in #6108
• (langchain) Revert input transformation by alexander-alderman-webb in #6109
• Set explicit base-branch for codecov action by ericapisani in #5992

---

_{🤖 This preview updates automatically when you update the PR.}