Tracing values (#6679)

* Switch to serde_json::Value for Visitor values

* add tests

* switch Visitor to use Map

* refactor change names

* \n

* update integration test

* use discrete maps for each type of recorded value

* update integration test

* add docs

* Update client/tracing/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* add docs

Co-authored-by: Matt Rutherford <mattrutherford@users.noreply.github.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>