Metadata endpoint

[matei-p]

Reasoning behind the pull request

Proposed changes

Testing procedure

Pre-requisites

Based on the Contributing Guidelines the PR author and the reviewers must check the following requirements are met:

• was the PR targeted to the correct branch?
• if this is a larger feature that probably needs more than one PR, is there a feat branch created?
• if this is a feat branch merging, do all satellite projects have a proper tag inside go.mod?

[codecov]

Codecov Report

Patch coverage: 82.96% and project coverage change: +0.77 🎉

Comparison is base (25c4f23) 78.87% compared to head (5c5bd4b) 79.65%.

❗ Current head 5c5bd4b differs from pull request most recent head 0e6f368. Consider uploading reports for the commit 0e6f368 to get more accurate results

Additional details and impacted files

@@              Coverage Diff               @@
##           feat/vm1.5    #5353      +/-   ##
==============================================
+ Coverage       78.87%   79.65%   +0.77%     
==============================================
  Files             688      703      +15     
  Lines           90390    92465    +2075     
==============================================
+ Hits            71299    73652    +2353     
+ Misses          13754    13464     -290     
- Partials         5337     5349      +12     

Impacted Files	Coverage Δ
api/groups/blockGroup.go	97.95% <ø> (ø)
api/middleware/responseLogger.go	66.66% <0.00%> (ø)
common/channels.go	57.14% <0.00%> (-42.86%)	⬇️
common/trie.go	38.46% <0.00%> (-44.88%)	⬇️
consensus/spos/bls/subroundStartRound.go	68.36% <0.00%> (ø)
...ataRetriever/dataPool/headersCache/headersCache.go	90.15% <ø> (+10.60%)	⬆️
epochStart/shardchain/trigger.go	65.89% <0.00%> (ø)
factory/core/coreComponents.go	90.29% <ø> (ø)
node/external/blockAPI/metaBlock.go	78.49% <ø> (ø)
node/external/blockAPI/shardBlock.go	75.18% <ø> (ø)
... and 57 more

... and 108 files with indirect coverage changes

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