Fix setting txn author agreement

[Patrik-Stas]

• 0.55.0 release contained bug that transaction author agreement doesn't get set up in global settings state of aries-vcx-core, therefore ledger writes doesn't work for indy ledgers which require transaction author agreement
• this fixes the issue

[codecov-commenter]

Codecov Report

Merging #824 (6c3f9ea) into main (036bbf9) will decrease coverage by 0.75%.
The diff coverage is 7.69%.

@@            Coverage Diff             @@
##             main     #824      +/-   ##
==========================================
- Coverage   49.06%   48.31%   -0.75%     
==========================================
  Files         410      410              
  Lines       33501    33468      -33     
  Branches     7440     7428      -12     
==========================================
- Hits        16436    16170     -266     
- Misses      11949    12221     +272     
+ Partials     5116     5077      -39     

Flag	Coverage Δ
unittests-aries-vcx	48.28% <7.69%> (-0.75%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
aries_vcx/src/utils/author_agreement.rs	0.00% <0.00%> (-71.16%)	⬇️
aries_vcx_core/src/global/settings.rs	54.38% <0.00%> (-6.40%)	⬇️
aries_vcx_core/src/indy/ledger/transactions.rs	40.59% <0.00%> (-4.49%)	⬇️
aries_vcx_core/src/ledger/indy_vdr_ledger.rs	32.87% <0.00%> (ø)
aries_vcx_core/src/utils/mod.rs	100.00% <ø> (ø)
aries_vcx_core/src/utils/author_agreement.rs	8.33% <50.00%> (ø)

... and 58 files with indirect coverage changes