* refactor: deprecates ModuleSystem.render_template
in favor of the added MakoSystem render_template method.
Related changes:
* Adds the MakoService to the StudioEditModuleRuntime,
PreviewModuleSystem, LmsModuleSystem, and XBlockRuntime
* MakoService constructor takes a `namespace_prefix` string, so that the
CMS PreviewModuleSystem can render to LMS templates, without needing
the special render_from_lms helper method.
* ModuleSystem.render_template becomes a read-only property, so the
constructor calls and test module systems are updated accordingly.
* Adds tests for the MakoService and module system shims.
(cherry picked from commit 457f959356)
* refactor: use MakoService.render_template to remove deprecation warnings
from block code.
(cherry picked from commit 8d62d337f5)
* refactor: use MakoService.render_template to remove deprecation warnings
from test code.
(cherry picked from commit 26b43465a4)
* test: Adds a test to verify the bug introduced by the previous changes
The AuthoringMixin is automatically added to all XBlocks (see
settings.XBLOCK_MIXINS), and AuthoringMixin.visibility_view expects the
"mako" service.
This test verifies the bug by testing the PureXBlock, which does not
require the "mako" service, and so fails when the visibility_view is
rendered.
* fix: AuthoringMixin needs mako service
which fixes the visibility_view for XBlocks which don't explicitly
require the mako service.
Also removes the unneeded class property _services_requested from
AuthoringMixin and StudioEditableBlock. This property is better provided
by the XBlockMixin class.
