chore(lib/grandpa): SignedMessage Hash to BlockHash

[qdm12]

Changes

Just rename SignedMessage Hash field to BlockHash to avoid any confusion

Tests

go test -tags integration github.com/ChainSafe/gossamer/lib/grandpa

Issues

Created following a discussion from #2485

Primary Reviewer

@jimjbrettj

[codecov]

Codecov Report

Merging #2491 (df14566) into development (89c32ae) will increase coverage by 0.01%.
The diff coverage is 88.88%.

@@               Coverage Diff               @@
##           development    #2491      +/-   ##
===============================================
+ Coverage        61.57%   61.58%   +0.01%     
===============================================
  Files              215      215              
  Lines            28215    28215              
===============================================
+ Hits             17372    17376       +4     
+ Misses            9079     9076       -3     
+ Partials          1764     1763       -1     

Flag	Coverage Δ
unit-tests	61.58% <88.88%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
lib/grandpa/message.go	63.30% <0.00%> (ø)
lib/grandpa/message_tracker.go	65.93% <100.00%> (ø)
lib/grandpa/vote_message.go	83.70% <100.00%> (ø)
dot/network/notifications.go	63.79% <0.00%> (-1.38%)	⬇️
dot/network/light.go	85.25% <0.00%> (-0.80%)	⬇️
dot/state/epoch.go	49.29% <0.00%> (ø)
dot/network/inbound.go	92.98% <0.00%> (ø)
lib/runtime/wasmer/imports.go	48.45% <0.00%> (+0.04%)	⬆️
dot/telemetry/mailer.go	61.19% <0.00%> (+4.47%)	⬆️
dot/network/block_announce.go	63.20% <0.00%> (+4.80%)	⬆️

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[jimjbrettj]

Nice work!