Make BEEFY payload extensible (#10307)

* make BEEFY payload extensible

* cargo fmt

* cargo fmt

* remove generic payload param in beefy-primitives

* cargo fmt

* Apply suggestions from code review

Co-authored-by: Tomasz Drwięga <[email protected]>

* adds Paylaod Type

* remove hex

* fix tests

* Apply suggestions from code review

Co-authored-by: Tomasz Drwięga <[email protected]>

* use binary_search_by to sort

* Payload::new()

* fix tests

* Apply suggestions from code review

Co-authored-by: Tomasz Drwięga <[email protected]>

* fix tests

* cargo fmt

* fix get_decoded

* fix test

Co-authored-by: Tomasz Drwięga <[email protected]>