feat(rofl-client/rs): add HTTP transport

[uniyalabhishek]

closes #2446

[netlify]

✅ Deploy Preview for oasisprotocol-oasis-sdk canceled.

Name	Link
🔨 Latest commit	9aff4dc
🔍 Latest deploy log	https://app.netlify.com/projects/oasisprotocol-oasis-sdk/deploys/69c2d6f830e8ac0007eb48da

[codecov]

Codecov Report

❌ Patch coverage is 80.90909% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 51.33%. Comparing base (38d18ee) to head (9aff4dc).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
rofl-client/rs/src/lib.rs	80.90%	21 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2447      +/-   ##
==========================================
+ Coverage   51.26%   51.33%   +0.07%     
==========================================
  Files         237      237              
  Lines       17039    17106      +67     
==========================================
+ Hits         8735     8782      +47     
- Misses       8244     8264      +20     
  Partials       60       60              

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[matevz]

Make sure rust rofl-client is also tested by CI.

Maybe rename test-python-rofl-client to test-rofl-client-python and add test-rofl-client-rust here

oasis-sdk/.github/workflows/ci-test.yaml

Line 629 in 63b70fc

test-python-rofl-client: