Control txns backup to S3

[sandipbhoir]

Description

Addresses - https://github.com/Zilliqa/Issues/issues/570

Backward Compatibility

• This is not a breaking change
• This is a breaking change

Review Suggestion

Status

Implementation

• ready for review

Integration Test (Core Team)

• local machine test

• small-scale cloud test

[codecov-io]

Codecov Report

Merging #1780 into master will increase coverage by <.01%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master    #1780      +/-   ##
==========================================
+ Coverage   33.36%   33.36%   +<.01%     
==========================================
  Files         270      270              
  Lines       33417    33420       +3     
==========================================
+ Hits        11148    11150       +2     
- Misses      22269    22270       +1

Impacted Files	Coverage Δ
src/common/Constants.h	100% <ø> (ø)	⬆️
src/libNode/MicroBlockPreProcessing.cpp	0% <0%> (ø)	⬆️
src/common/Constants.cpp	99.75% <100%> (ø)	⬆️

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