✨ [#3573] Add a new template tag `as_json` #7907

Job	Run time
Check import sorting	1m 24s
Code style (flake8)	1m 11s
Check code formatting with black	1m 29s
Lint dependencies	7s
Check for model changes not present in the migrations or default_admin_index fixture	1m 56s
	6m 7s

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