chore: preserve README.rst in owlbot.py (#163)

* chore: use gapic-generator-python 0.58.1

fix: syntax fix for required_fields struct in rest transport

committer: parthea
PiperOrigin-RevId: 415363977

Source-Link: googleapis/googleapis@987192d

Source-Link: googleapis/googleapis-gen@5144432
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiNTE0NDQzMjRlYjk5ZjE1NTNkN2M3ZjgyNzdjZjU5NWE3MjBlNjkwNSJ9

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* update owlbot.py to preserve README.rst

* restore original README.rst

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Anthonios Partheniou <partheniou@google.com>

packages/google-cloud-trace/owlbot.py

@@ -30,7 +30,7 @@
         "type"
     )
 
-    s.move(library, excludes=["docs/index.rst", "setup.py"])
+    s.move(library, excludes=["docs/index.rst", "setup.py", "README.rst"])
 
 s.remove_staging_dirs()