fix: Client's fluent builder doc links now correctly link to raw identifiers (#1142)

* fix: don't escape member names in doc links

* update: CHANGELOG.next.toml

* update: use docLink to format builderInputLink

* Apply suggestions from code review

Co-authored-by: John DiSanti <jdisanti@amazon.com>

* remove: "r#" prefix from reserved word names in docs

* leave: "r#" prefix from reserved word names in docs
giving the people what they want

Co-authored-by: John DiSanti <jdisanti@amazon.com>