fix: enable the enterprise feature BEFORE plugins are loaded

[pwnage101]

This fixes a devstack-specific bug resulting in enterprise and consent plugin settings not being loaded because the entire enterprise feature was disabled (ENABLE_ENTERPRISE_INTEGRATION = False) when the plugins were loaded. Settings in devstack.py are loaded AFTER plugins are loaded, which makes it a bad place to flip on
ENABLE_ENTERPRISE_INTEGRATION because it would be too late.

Here's the order of operations:

1. lms/envs/common.py is loaded.
   a. ENABLE_ENTERPRISE_INTEGRATION set to False.
   b. add_plugins() is called.
   b. enterprise/settings/common.py is loaded.
   1. plugin_settings() exits early.
2. lms/envs/production.py is loaded.
   a. Loads the file /edx/etc/lms.yml seeded by configuration_files/lms.yml.
   b. ENABLE_ENTERPRISE_INTEGRATION stays False (‼️This PR updates this file to set it to True).
   b. enterprise/settings/production.py is loaded, which re-loads common.py.
   1. plugin_settings() exits early again because ENABLE_ENTERPRISE_INTEGRATION is still False.
3. lms/envs/devstack.py (seeded by py_configuration_files/lms.py) is loaded.
   a. FINALLY the enterprise feature is enabled, but it's too late because enterprise plugin has no devstack.py file, nor should it.

Alternatives Considered

• Just not exiting early inside of plugin_settings(). After all, the plugin framework docs make it pretty clear that installing a plugin pip package implies that it should be enabled---an enable flag would be redundant. The whole point is that a integrating a plugin should be as easy as pip installing it.
  • This approach was rejected at least for now, mainly because we're trying to carefully and incrementally transition the edx-enterprise package from being a required dependency to an optional one. Right now, everybody has this package installed, but not everybody wants it. We need to slowly ween operators off this package but that takes time.

[Copilot]

Pull request overview

Moves the ENABLE_ENTERPRISE_INTEGRATION = true setting from py_configuration_files/lms.py (devstack.py-style overrides loaded after plugins) to configuration_files/lms.yml (YAML configuration loaded before plugins), so the enterprise and consent plugin settings are properly loaded in devstack.

Changes:

• Remove ENABLE_ENTERPRISE_INTEGRATION = True and its comments from py_configuration_files/lms.py.
• Add ENABLE_ENTERPRISE_INTEGRATION: true with equivalent comments to configuration_files/lms.yml.
• Strip a trailing whitespace from the ENABLE_MKTG_SITE: true line.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
py_configuration_files/lms.py	Removes the late-loaded enterprise toggle so it can be set earlier via YAML.
configuration_files/lms.yml	Adds ENABLE_ENTERPRISE_INTEGRATION: true (with explanatory comments) before plugin loading; cleans trailing whitespace on a nearby line.

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