Add/Modify Url Encoding/Decoding for IIS UrlRewrite (#40483)

* Change encoding function to excape data string for performance.
Add decoding function and plug it into input parser (#5985)

* Add test InputParsers ParseString for server variable

* Add encoded query values tests

Co-authored-by: Bartosz Sendek <bsendek@sii.pl>
Co-authored-by: Sébastien Ros <sebastienros@gmail.com>