[MRG + 1] ENH add check_inverse in FunctionTransformer (#9399)

* EHN add check_inverse in FunctionTransformer

* Add whats new entry and short narrative doc

* Sparse support

* better handle sparse data

* Address andreas comments

* PEP8

* Absolute tolerance default

* DOC fix docstring

* Remove random state and make check_inverse deterministic

* FIX remove random_state from init

* PEP8

* DOC motivation for the inverse

* make check_inverse=True default with a warning

* PEP8

* FIX get back X from check_array

* Andread comments

* Update whats new

* remove blank line

* joel s comments

* no check if one of forward or inverse not provided

* DOC fixes and example of filterwarnings

* DOC fix warningfiltering

* DOC fix merge error git