Default to an empty OptionsBootstrapper on initial setup

[ci skip-rust]
[ci skip-build-wheels]

src/python/pants/engine/internals/build_files_test.py

@@ -3,7 +3,7 @@
 
 import re
 from textwrap import dedent
-from typing import Iterable, Optional, Set, cast
+from typing import Iterable, Set, cast
 
 import pytest
 

src/python/pants/engine/internals/graph_test.py

@@ -5,7 +5,7 @@
 from dataclasses import dataclass
 from pathlib import PurePath
 from textwrap import dedent
-from typing import Iterable, List, Optional, Set, Tuple, Type
+from typing import Iterable, List, Set, Tuple, Type
 
 import pytest
 

src/python/pants/engine/internals/options_parsing_test.py

@@ -6,7 +6,6 @@
 from pants.engine.rules import SubsystemRule
 from pants.option.scope import GLOBAL_SCOPE, Scope, ScopedOptions
 from pants.python.python_setup import PythonSetup
-from pants.testutil.option_util import create_options_bootstrapper
 from pants.testutil.rule_runner import QueryRule, RuleRunner
 from pants.util.logging import LogLevel
 

src/python/pants/testutil/rule_runner.py

@@ -126,7 +126,11 @@ def __init__(
             build_root=self.build_root,
             build_configuration=self.build_config,
             execution_options=ExecutionOptions.from_bootstrap_options(global_options),
-        ).new_session(build_id="buildid_for_test", should_report_workunits=True)
+        ).new_session(
+            build_id="buildid_for_test",
+            session_values=SessionValues({OptionsBootstrapper: create_options_bootstrapper()}),
+            should_report_workunits=True,
+        )
         self.scheduler = graph_session.scheduler_session
 
     def __repr__(self) -> str: