* Initial changes to allow pymc3.Data() to support both int and float input data (previously all input data was coerced to float)
WIP for #3813

* added exception for invalid dtype input to pandas_to_array

* Refined implementation

* Finished dtype conversion handling

* Added SharedVariable option to getattr_value

* Added dtype handling to set_data function

* Added tests for pm.Data used for index variables

* Added tests for using pm.data as RV input

* Ran Black on data tests files

* Added release note

* Updated release notes

* Updated code in light of Luciano's comments

* Fixed implementation of integer checking

* Simplified implementation of type checking

* Corrected implementation for other uses of pandas_to_array

Co-authored-by: hottwaj <jonathan.a.clarke@gmail.com>