Deprecate Pipelines (#6169)
* deprecate pipe
* make style
* update
* add deprecation message
* format
* remove tests for deprecated pipelines
* remove deprecation message
* make style
* fix copies
* clean up
* clean
* clean
* clean
* clean up
* clean up
* clean up toctree
* clean up
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Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>
