feat: call private function in simnet

[hugocaillard]

Fix: #547

Description

Allow to contract private functions from the simnet.
It requires the changes of this PR stacks-network/stacks-core#4520, which have been cherry-picked on feat/clarity-wasm-next.

call_contract_fn

In the interpreter, there's a new call_contract_fn method that can be used instead of run or execute to perform contract calls.
This method is slightly more performant (it doesn't build an virtual contract and has a better clarity args serialization logic).

This improved way to all contract functions is now used for callPublicFn and callReadOnlyFn as well

---

Checklist

• Tests added in this PR (if applicable)

[codecov]

Codecov Report

Attention: Patch coverage is 71.28713% with 87 lines in your changes are missing coverage. Please review.

Project coverage is 41.80%. Comparing base (dbc0178) to head (43e060f).

Files	Patch %	Lines
components/clarity-repl/src/repl/session.rs	0.00%	55 Missing ⚠️
components/clarity-repl/src/repl/interpreter.rs	87.04%	32 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1380      +/-   ##
==========================================
+ Coverage   41.38%   41.80%   +0.42%     
==========================================
  Files          87       88       +1     
  Lines       31993    32405     +412     
==========================================
+ Hits        13241    13548     +307     
- Misses      18752    18857     +105     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.