Do not bind to vdrtools FFI in ios wrapper

[Patrik-Stas]

• Ios wrapper contains links to vdrtools FFI functions - this PR is removing functions which links to vdrtools symbols (which are included, if vdrtools feature ffi_api is enabled).
• Ios wrapper should only use API directly exposed by libvcx
• Consequently we no longer use vdrtools feature ffi_api

Signed-off-by: Patrik Stas patrik.stas@absa.africa

[codecov-commenter]

Codecov Report

Merging #723 (d5eb916) into main (93de484) will increase coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #723      +/-   ##
==========================================
+ Coverage   64.30%   64.39%   +0.09%     
==========================================
  Files         245      244       -1     
  Lines       22911    22828      -83     
  Branches     5086     5064      -22     
==========================================
- Hits        14733    14701      -32     
+ Misses       4035     4003      -32     
+ Partials     4143     4124      -19     

Flag	Coverage Δ
unittests-aries-vcx	64.25% <ø> (+0.09%)	⬆️

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

Impacted Files	Coverage Δ
aries_vcx/src/errors/mapping_vdrtools.rs	39.39% <0.00%> (-12.78%)	⬇️
aries_vcx/src/common/proofs/prover/prover.rs	48.57% <0.00%> (-2.86%)	⬇️
aries_vcx/src/indy/proofs/verifier/verifier.rs	61.11% <0.00%> (-2.05%)	⬇️
aries_vcx/src/indy/signing.rs	61.11% <0.00%> (-1.86%)	⬇️
...ies_vcx/src/indy/primitives/revocation_registry.rs	58.26% <0.00%> (-0.87%)	⬇️
...s_vcx/src/common/primitives/revocation_registry.rs	48.82% <0.00%> (-0.59%)	⬇️
aries_vcx/src/common/ledger/transactions.rs	62.32% <0.00%> (-0.36%)	⬇️
aries_vcx/src/indy/wallet.rs	38.15% <0.00%> (-0.31%)	⬇️
messages/src/a2a/mod.rs	61.53% <0.00%> (-0.20%)	⬇️
.../src/protocols/connection/inviter/state_machine.rs	72.53% <0.00%> (-0.18%)	⬇️
... and 34 more

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[gmulhearn]

Hey @Patrik-Stas could you please add a little description context to this PR? - Mostly for my own education.

Did the libvdrtools ffi_api feature expose some C functions which the iOS Indy... Header files would target within the libvcx.a binary? And now the intention is to move away from having any of those direct indy functions in the wrappers?

[Patrik-Stas]

Hey @Patrik-Stas could you please add a little description context to this PR? - Mostly for my own education.

Did the libvdrtools ffi_api feature expose some C functions which the iOS Indy... Header files would target within the libvcx.a binary? And now the intention is to move away from having any of those direct indy functions in the wrappers?

apologies for missing PR description, added here as well as on my other recent PRs. Nevertheless your understanding is precisely correct.