feat(ollama): tool calling

[sathvikrav]

Fixes #1688

• [Yes] I have added tests that cover my changes.
• [No ] If adding a new instrumentation or changing an existing one, I've added screenshots from some observability platform showing the change.
• [Yes] PR name follows conventional commits format: feat(instrumentation): ... or fix(instrumentation): ....
• [NA] (If applicable) I have updated the documentation accordingly.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

---

Sathvik Ravi seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}