[views] remove breadcrumbs usage to retrieve last visited page
Use JavaScript history.back to go to the last visited page. Rename
_return_to_lastpage to _redirect as it becomes misnamed.
Drop `test_redirect_default` test in `unittest_views_basecontrollers`
which essentially tested this (now removed) breadcrumbs "feature".
Closes #5456850.
[MESSAGES CONTROL]
disable-msg = C0301
[VARIABLES]
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additional-builtins = _, display_name
[BASIC]
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variable-rgx = (w|[a-z_][a-z0-9_]{2,30})$
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[TYPECHECK]
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