Lazy_gettext in i18nMiddleware have enable_cache=False by default

[Birdi7]

Description

It fixes the issue when different invocations of the same LazyProxy object generated by lazy_gettext("some_msg") results in different text for different locales, as when enable_cache=True, the first text will be cached in the state of the object, so it will be returned on every next invocation. The behavior isn't intuitive and can be considered as a bug.
Here is the links which provide more information: 1, 2

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes