Separate MultiUser configuration

To date, we've been comingling the MEP and UEP configurations in `Config`.  At
this time, the two implementations are starting to diverge in their overlap, so
bite the bullet and be clear about the differences.  This implementation uses
`BaseConfig` for the shared attributes, maintains `Config` for backward
compatability, and introduces `UserEndpointConfig` for the user endpoint and
`ManagerEndpointConfig` for the endpoint manager configuration.

The core of the changes start in `endpoint/config/config.py`, where
`UserEndpointConfig` (for UEPs) and `ManagerEndpointConfig` (for MEPs) are
defined.  These are backed up by requisite changes to the Pydantic model in
`config/model.py`,  Just about every other change is in support of the
now-distinct configuration classes.

Notes:
 - test coverage has increased around the configurations
 - the YAML facade shouldn't change at all from the user perspective.  This is
   an internal organization detail

[sc-37362]

compute_endpoint/globus_compute_endpoint/boot_persistence.py

@@ -4,6 +4,7 @@
 import textwrap
 
 from click import ClickException
+from globus_compute_endpoint.endpoint.config import UserEndpointConfig
 from globus_compute_endpoint.endpoint.config.utils import get_config
 from globus_compute_endpoint.endpoint.endpoint import Endpoint
 from globus_sdk import GlobusApp
@@ -49,7 +50,7 @@ def enable_on_boot(ep_dir: pathlib.Path, app: GlobusApp):
     ep_name = ep_dir.name
 
     config = get_config(ep_dir)
-    if not config.multi_user:
+    if isinstance(config, UserEndpointConfig):  # aka: not multi_user
         if config.detach_endpoint:
             # config.py takes priority if it exists
             if (ep_dir / "config.py").is_file():

compute_endpoint/globus_compute_endpoint/cli.py

@@ -15,7 +15,10 @@
 from click import ClickException
 from click_option_group import optgroup
 from globus_compute_endpoint.boot_persistence import disable_on_boot, enable_on_boot
-from globus_compute_endpoint.endpoint.config import Config
+from globus_compute_endpoint.endpoint.config import (
+    ManagerEndpointConfig,
+    UserEndpointConfig,
+)
 from globus_compute_endpoint.endpoint.config.utils import get_config, load_config_yaml
 from globus_compute_endpoint.endpoint.endpoint import Endpoint
 from globus_compute_endpoint.endpoint.utils import (
@@ -90,7 +93,7 @@ def get_globus_app_with_scopes() -> GlobusApp:
     return app
 
 
-def get_cli_endpoint(conf: Config) -> Endpoint:
+def get_cli_endpoint(conf: UserEndpointConfig) -> Endpoint:
     # this getter creates an Endpoint object from the CommandState
     # it takes its various configurable values from the current CommandState
     # as a result, any number of CLI options may be used to tweak the CommandState
@@ -673,20 +676,20 @@ def _do_start_endpoint(
             log.critical(msg)
             raise
 
-        if die_with_parent:
-            # The endpoint cannot die with its parent if it
-            # doesn't have one :)
-            ep_config.detach_endpoint = False
-            log.debug("The --die-with-parent flag has set detach_endpoint to False")
-
-        if ep_config.multi_user:
+        if isinstance(ep_config, ManagerEndpointConfig):
             if not _has_multi_user:
                 raise ClickException(
                     "multi-user endpoints are not supported on this system"
                 )
             epm = EndpointManager(ep_dir, endpoint_uuid, ep_config, reg_info)
             epm.start()
         else:
+            assert isinstance(ep_config, UserEndpointConfig)
+            if die_with_parent:
+                # The endpoint cannot die with its parent if it doesn't have one :)
+                ep_config.detach_endpoint = False
+                log.debug("The --die-with-parent flag has set detach_endpoint to False")
+
             get_cli_endpoint(ep_config).start_endpoint(
                 ep_dir,
                 endpoint_uuid,

compute_endpoint/globus_compute_endpoint/endpoint/config/__init__.py

@@ -1 +1,11 @@
-from .config import Config  # noqa: F401
+from .config import (  # noqa: F401
+    BaseConfig,
+    Config,
+    ManagerEndpointConfig,
+    UserEndpointConfig,
+)
+from .model import (  # noqa: F401
+    BaseConfigModel,
+    ManagerEndpointConfigModel,
+    UserEndpointConfigModel,
+)