Revert build system changes

Author: dandavison

pyproject.toml

@@ -67,10 +67,6 @@ include = [
 ]
 exclude = ["temporalio/bridge/**/target"]
 
-[build-system]
-requires = ["hatchling"]
-build-backend = "hatchling.build"
-
 [tool.poe.tasks]
 build-develop = "python scripts/setup_bridge.py develop"
 build-develop-with-release = { cmd = "python scripts/setup_bridge.py develop", env = { TEMPORAL_BUILD_RELEASE = "1" }}
@@ -222,3 +218,7 @@ exclude = [
 
 [tool.ruff]
 target-version = "py39"
+
+[build-system]
+build-backend = "poetry.core.masonry.api"
+requires = ["poetry-core>=1.0.0", "setuptools", "wheel", "setuptools-rust"]