Runtime interface to add support for tracing from wasm (#6381)

* Add span recording to tracing implementation

* Add tracing proxy

* switch to rustc_hash::FxHashMap

* Replace lazy_static and hashmap with thread_local and vec.

* fix marking valid span as invalid while removing invalid spans

* refactor, add wasm_tracing module in `support`

* update registered spans

* tidy up

* typos

* refactor

* update flag name to signal lost trace - `is_valid_trace`

* update flag name to signal lost trace - `is_valid_trace`

* update docs

* update docs

* Use tracing Field recording to store the actual `name` and `target`
from wasm traces.

* fix debug log in subscriber + small refactor

* add tests

* handle misuse in case trying to exit span not held

* Implement filter for wasm traces, simplify field recording for primitive types

* remove superfluous warning

* update docs

* Update primitives/tracing/src/proxy.rs

Co-authored-by: Kian Paimani <5588131+kianenigma...