feat: added trusted relayer (#137)

* feat: added trusted relayer

* chore: update near-sdk version for tests

* feat: allow only `DAO` to set relayer config

* chore: updated `omni-utils`

* chore: bumped contract version

* fix: tests

* chore: updated `omni-utils`

* chore: updated `omni-utils`

* chore: removed pause exception for block submission

* fix: clippy

* feat(tests): covered that only trusted relayers can call submit blocks

* chore: bring back `pause`

Author: frolvanya