Add node authority status metric (#4699)

* Check authority status on active leaves update

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* cargo changes

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Fix tests

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Add metric for authority status

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Revert "Fix tests"

This reverts commit 5bd56bb367ec0b01ecca04498b3974ab67bf3189.

* Revert "cargo changes"

This reverts commit ffea18fe3ca12b27e6471ad9f44592799ec90956.

* Revert "Check authority status on active leaves update"

This reverts commit 55a30ac81bf32a72e0b79ca2e7bb612344a5c43d.

* Test fixups

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* fix

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* update

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* undo damage

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* dont update status on runtime errors

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Fix tests

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* fix inconsistency

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Review feedback

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* Dont derive primitive Default

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* add dummy_session_info helper

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* unset parachain validator status if no longer authority

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* update

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* damn

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>

* 



Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>