* Histogram support in runtime metrics
Add support for histograms to the runtime metrics. Additionally add
`polkadot_parachain_verify_dispute_signature` histogram which tracks the
time needed from the runtime to verify a single validator signature of a
dispute statement.
* Add noops
* u64 instead of f64
* Update buckets
* Wrap `get_current_time()` in runtime metrics
* Change the dimension of the Histogram from usec to sec
* Fix a compilation error
* Update buckets
* Fix `on_signature_check_complete` calculation
* Update buckets
* Update buckets
* formatting
* Another weights update
* Adjust buckets again
* Final buckets adjustment
* Revert "Fix a compilation error"
This reverts commit 06290b40a39eeb78de2602d8916a39edf7a8b714.
* Update primitives/src/v4/metrics.rs
Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>
* Use `saturating_sub` for time difference calculation
* Pass nanoseconds to client instead of seconds (using f64 in runtime is dangerous)
---------
Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>