lift HasSampleValues restriction on Signable trait

[CyonAlexRDX]

we use:

impl<S: Signable + HasSampleValues> HasSampleValues for SignRequest<S>
where
    S::Payload: HasSampleValues,
    S::ID: HasSampleValues,
{
...
}

And in many more places

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.7%. Comparing base (a5b833a) to head (51ee379).
Report is 3 commits behind head on micbakos/ABW-3989-expose-interactors.

Additional details and impacted files

@@                         Coverage Diff                          @@
##           micbakos/ABW-3989-expose-interactors    #290   +/-   ##
====================================================================
  Coverage                                  92.7%   92.7%           
====================================================================
  Files                                       799     799           
  Lines                                     18371   18371           
  Branches                                     77      77           
====================================================================
  Hits                                      17035   17035           
  Misses                                     1322    1322           
  Partials                                     14      14           

Flag	Coverage Δ
kotlin	98.0% <ø> (ø)
rust	92.3% <ø> (ø)

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

Files with missing lines	Coverage Δ
...argon/src/signing/host_interaction/sign_request.rs	100.0% <ø> (ø)
...rgon/src/signing/host_interaction/sign_response.rs	100.0% <ø> (ø)
...host_interaction/transaction_sign_request_input.rs	100.0% <ø> (ø)
.../src/signing/petition_types/petition_for_entity.rs	93.7% <ø> (ø)
...for_factors/petition_for_factors_state_snapshot.rs	100.0% <ø> (ø)
crates/sargon/src/signing/signables/signable.rs	96.5% <ø> (ø)
...atures_outecome_types/maybe_signed_transactions.rs	94.2% <ø> (ø)
...atures_outecome_types/sign_with_factors_outcome.rs	91.3% <ø> (ø)
crates/sargon/src/types/hd_signature.rs	100.0% <ø> (ø)
crates/sargon/src/types/hd_signature_input.rs	100.0% <ø> (ø)
... and 1 more