Remove all unwraps from runtime code

[1xstj]

Summary of changes
Changes introduced in this pull request:

• Replace unwrap() with errors where possible
• In infallible functions, use expect() instead
• Add unwrap check to clippy CI
• Add allow unwrap to test files

Reference issue to close (if applicable)
Closes #572

[codecov-commenter]

Codecov Report

Patch coverage: 26.32% and project coverage change: -0.12 ⚠️

Comparison is base (0d8321c) 19.07% compared to head (dcd4f69) 18.94%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #584      +/-   ##
==========================================
- Coverage   19.07%   18.94%   -0.12%     
==========================================
  Files          75       75              
  Lines        4978     5016      +38     
==========================================
+ Hits          949      950       +1     
- Misses       4029     4066      +37     

Impacted Files	Coverage Δ
...gadget/src/async_protocols/blockchain_interface.rs	0.00% <0.00%> (ø)
dkg-gadget/src/async_protocols/incoming.rs	0.00% <0.00%> (ø)
dkg-gadget/src/async_protocols/mod.rs	0.00% <0.00%> (ø)
dkg-gadget/src/async_protocols/sign/handler.rs	0.00% <0.00%> (ø)
dkg-gadget/src/debug_logger.rs	0.00% <ø> (ø)
...-gadget/src/gossip_messages/misbehaviour_report.rs	0.00% <0.00%> (ø)
...kg-gadget/src/gossip_messages/public_key_gossip.rs	0.00% <0.00%> (ø)
dkg-gadget/src/worker.rs	0.00% <0.00%> (ø)
dkg-runtime-primitives/src/lib.rs	36.00% <ø> (ø)
pallets/bridge-registry/src/lib.rs	0.00% <0.00%> (ø)
... and 5 more

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