Changes in Endorser Protocol

[HarshMultani-AyanWorks]

This pull request consists of the following changes in endorser protocol :

1. The author can give the functionality to the endorser where he/she can auto-write the transaction to the ledger after it gets endorsed.
2. The agent from where the transaction is written to the ledger is separated, it the author writes the transaction, it would go from author's agent and same for endorser.
3. Always, the record would be stored in author's wallet, irrespective of who (Author/Endorser) actually writes the transaction to the ledger.

[codecov-commenter]

Codecov Report

Merging #1200 (1d76f51) into main (fb73782) will decrease coverage by 0.04%.
The diff coverage is 65.90%.

@@            Coverage Diff             @@
##             main    #1200      +/-   ##
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- Coverage   98.52%   98.48%   -0.05%     
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  Files         452      452              
  Lines       25185    25218      +33     
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+ Hits        24814    24835      +21     
- Misses        371      383      +12