chore(setup/pypi): update pypi.org Project links (#4035)

## Description
Add [PEP-0345 project URL](https://peps.python.org/pep-0345/#project-url-multiple-use) in setup.py.

**Side Effect:** Pypi will show more links in left side bar under "Project links" (e.g: https://pypi.org/project/gevent/)

## Checklist
- [x] Title must conform to [conventional commit](https://github.com/conventional-changelog/commitlint/tree/master/%40commitlint/config-conventional).


## Reviewer Checklist
- [ ] Title is accurate.
- [ ] Description motivates each change.
- [ ] No unnecessary changes were introduced in this PR.
- [ ] PR cannot be broken up into smaller PRs.
- [ ] Avoid breaking [API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces) changes unless absolutely necessary.
- [ ] Tests provided or description of manual testing performed is included in the code or PR.
- [ ] Release note has been added for fixes and features, or else `changelog/no-changelog` label added.
- [ ] All relevant GitHub issues are correctly linked.
- [ ] Backports are identified and tagged with Mergifyio.
- [ ] Add to milestone.

Author: avara1986

setup.py

@@ -219,6 +219,12 @@ def get_exts_for(name):
         "Changelog": "https://ddtrace.readthedocs.io/en/stable/release_notes.html",
         "Documentation": "https://ddtrace.readthedocs.io/en/stable/",
     },
+    project_urls={
+        "Bug Tracker": "https://github.com/DataDog/dd-trace-py/issues",
+        "Source Code": "https://github.com/DataDog/dd-trace-py/",
+        "Changelog": "https://ddtrace.readthedocs.io/en/stable/release_notes.html",
+        "Documentation": "https://ddtrace.readthedocs.io/en/stable/",
+    },
     author="Datadog, Inc.",
     author_email="[email protected]",
     long_description=long_description,