TextProfiler only do case sensitivity at report

[JGSweets]

Instead of case sensitivity being checked at profile time, we can leave sensitivity on and at report time we can then output collapse it if the options require case-insensitive.

[lettergram]

This would solve #210

[JGSweets]

This applies to: https://github.com/capitalone/DataProfiler/blob/main/dataprofiler/profilers/unstructured_text_profile.py

Instead of applying is_case_sensitive in the functions _update_words, _update_vocab, _merge_words, move them to merging the counts in the functions profile and diff

[thebadcoder96]

Can I work on this? Would I just have to move the application of case-sensitive to the functions mentioned in the above comment?