Lock Sagemaker to version 2.

The upgrade to 3.0.1 changed the interface & broke our tests.

PiperOrigin-RevId: 839788422

Author: hubatish

perfkitbenchmarker/providers/aws/aws_jump_start.py

@@ -227,7 +227,7 @@ def _AddTags(self, resource_type: str, resource_name: str) -> None:
   def _CreateDependencies(self) -> None:
     self.vm.Install('pip')
     self.vm.Install('awscli')
-    self.vm.RunCommand('pip install sagemaker')
+    self.vm.RunCommand('pip install "sagemaker<3.0.0"')
     self.vm.RunCommand('pip install absl-py')
     self.python_script = self.vm.PrepareResourcePath(AWS_RUNNER_SCRIPT)
     super()._CreateDependencies()