Added fallback on topicRequestSender in case requests on full archive nodes fail

[sstanculeanu]

Reasoning behind the pull request

• there might be a possibility when running a regular node,

Proposed changes

• add a fallback option.. if the requests sent on full archive network fail, try on the regular one

Testing procedure

• standard system test

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

All modified lines are covered by tests ✅

Comparison is base (c10cdea) 80.15% compared to head (ac5f985) 80.16%.
Report is 1 commits behind head on rc/v1.6.0.

❗ Current head ac5f985 differs from pull request most recent head e190b68. Consider uploading reports for the commit e190b68 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           rc/v1.6.0    #5604   +/-   ##
==========================================
  Coverage      80.15%   80.16%           
==========================================
  Files            708      708           
  Lines          93850    93860   +10     
==========================================
+ Hits           75225    75241   +16     
+ Misses         13288    13282    -6     
  Partials        5337     5337           

Files	Coverage Δ
dataRetriever/topicSender/topicRequestSender.go	100.00% <100.00%> (ø)

... and 4 files with indirect coverage changes

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