Incorrect information in new.block event payload

[priojeetpriyom]

What was the problem?

This PR resolves #1930

How was it solved?

• Fetch transactions by blockID before formatting to generate numberOfTransactions
• Use processed transactions as transactions payload instead of querying node

How was it tested?

• Local

[codecov]

Codecov Report

Merging #1932 (6b8d2c3) into release/0.7.0 (e179feb) will decrease coverage by 0.08%.
The diff coverage is 20.00%.

Additional details and impacted files

@@                Coverage Diff                @@
##           release/0.7.0    #1932      +/-   ##
=================================================
- Coverage          67.78%   67.71%   -0.08%     
=================================================
  Files                299      299              
  Lines               5284     5290       +6     
  Branches             963      968       +5     
=================================================
  Hits                3582     3582              
- Misses              1702     1708       +6     

Files	Coverage Δ
...es/blockchain-indexer/shared/dataService/blocks.js	28.78% <25.00%> (-0.90%)	⬇️
...hain-indexer/shared/dataService/business/blocks.js	17.79% <16.66%> (-0.45%)	⬇️