New metrics state and events computation times

[Sriep]

Fixes

fixes part of #2196

Changes

Need to be mentioned in CHANGELOG.md?

Tests

Tasks to complete before merging PR:

• Ensure system tests are passing. If not Run them manually to check for any regressions 📋
• Do any new system tests need added to test this change? do any existing system tests need updated? If so create a PR at 0chain/system_test
• Merge your system tests PR to master AFTER merging this PR

Associated PRs (Link as appropriate):

• blobber:
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

Codecov Report

Merging #2357 (a3b7751) into staging (a772384) will increase coverage by 0.00%.
The diff coverage is 62.50%.

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@@           Coverage Diff            @@
##           staging    #2357   +/-   ##
========================================
  Coverage    28.95%   28.95%           
========================================
  Files          377      377           
  Lines        63151    63165   +14     
========================================
+ Hits         18286    18291    +5     
- Misses       42713    42724   +11     
+ Partials      2152     2150    -2     

Flag	Coverage Δ
Unit-Tests	28.95% <62.50%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
...de/go/0chain.net/chaincore/chain/protocol_block.go	0.00% <0.00%> (ø)
code/go/0chain.net/chaincore/chain/state.go	4.24% <33.33%> (+0.27%)	⬆️
code/go/0chain.net/sharder/handler.go	44.08% <100.00%> (+1.88%)	⬆️

... and 3 files with indirect coverage changes

[dabasov]

lgtm

[service-0chain]

Manual system tests [failure] with the following config

config	value
tests skipped	FALSE
system-tests	master
gosdk	staging
zboxcli	staging
zwalletcli	staging
0chain	new_metrics
blobber	staging
authorizer	staging
0box	staging
0dns	staging