Update dependency django-cleanup to v8

This MR contains the following updates:

Package	Type	Update	Change
django-cleanup	dependencies	major	^7.0.0 -> ^8.0.0

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Release Notes

un1t/django-cleanup

v8.0.0

Compare Source

Added

• Run tests for django 4.2. MR [#​100] from @​johnthagen.

Removed

• Dropped support for django 4.0.

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