Support new robot 7.4 secret variables as part of auth params

[oboehmer]

resolves #410

[codecov]

Codecov Report

❌ Patch coverage is 73.68421% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.72%. Comparing base (19c9017) to head (bd4c74c).

Files with missing lines	Patch %	Lines
src/RequestsLibrary/SessionKeywords.py	40.00%	3 Missing ⚠️
src/RequestsLibrary/RequestsKeywords.py	33.33%	1 Missing and 1 partial ⚠️

❗ There is a different number of reports uploaded between BASE (19c9017) and HEAD (bd4c74c). Click for more details.

HEAD has 12 uploads less than BASE

Flag	BASE (19c9017)	HEAD (bd4c74c)
acceptance	12	0

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #411       +/-   ##
===========================================
- Coverage   85.38%   60.72%   -24.66%     
===========================================
  Files           9        9               
  Lines         479      494       +15     
  Branches       49       51        +2     
===========================================
- Hits          409      300      -109     
- Misses         65      185      +120     
- Partials        5        9        +4     

Flag	Coverage Δ
acceptance	?
unit	60.72% <73.68%> (?)

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[oboehmer]

@lucagiove . Can you please review this PR? Would be great to have this available once rf7.4 is released