Fix/protocols problem report

[bobozaur]

This PR addresses #835 and #836, essentially adding a ProblemReport message to both the IssueCredential and PresentProof protocols.

[codecov-commenter]

Codecov Report

Merging #840 (794b6d3) into main (a7cc540) will decrease coverage by 40.40%.
The diff coverage is 3.38%.

@@            Coverage Diff             @@
##             main    #840       +/-   ##
==========================================
- Coverage   49.09%   8.69%   -40.40%     
==========================================
  Files         410     408        -2     
  Lines       33517   32854      -663     
  Branches     7443    7211      -232     
==========================================
- Hits        16456    2858    -13598     
- Misses      11948   29189    +17241     
+ Partials     5113     807     -4306     

Flag	Coverage Δ
unittests-aries-vcx	8.69% <3.38%> (-40.37%)	⬇️

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

Impacted Files	Coverage Δ
...ies_vcx/src/common/primitives/credential_schema.rs	27.55% <ø> (-18.90%)	⬇️
aries_vcx/src/handlers/util.rs	7.22% <0.00%> (-9.23%)	⬇️
aries_vcx/src/protocols/connection/generic/mod.rs	35.58% <ø> (ø)
aries_vcx/src/protocols/connection/invitee/mod.rs	69.44% <ø> (ø)
aries_vcx/src/protocols/issuance/actions.rs	0.00% <0.00%> (-40.91%)	⬇️
...vcx/src/protocols/issuance/holder/state_machine.rs	0.00% <0.00%> (-42.73%)	⬇️
...vcx/src/protocols/issuance/issuer/state_machine.rs	0.00% <0.00%> (-48.66%)	⬇️
...ocols/mediated_connection/invitee/state_machine.rs	0.00% <ø> (-51.99%)	⬇️
...rc/protocols/proof_presentation/prover/messages.rs	0.00% <0.00%> (-28.13%)	⬇️
...otocols/proof_presentation/prover/state_machine.rs	0.00% <0.00%> (-32.16%)	⬇️
... and 20 more

... and 282 files with indirect coverage changes