Update Conan dependencies: various

[bthomee]

High Level Overview of Change

This PR updates snappy, onetbb, zstd, zlib, and libpq. The snappy library has been removed from the external/ directory, as the latest version no longer needs our custom patches. In addition, building the optional secp256k1 binaries is turned off.

Context of Change

Dependency scanning revealed that current dependencies are out of date. Updating dependencies allows us to take advantage of bug fixes, new features, and/or security improvements.

Type of Change

• Refactor (non-breaking change that only restructures code)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.1%. Comparing base (851d99d) to head (0e7667c).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #5349     +/-   ##
=========================================
- Coverage     78.2%   78.1%   -0.0%     
=========================================
  Files          795     795             
  Lines        68448   68447      -1     
  Branches      8273    8277      +4     
=========================================
- Hits         53493   53484      -9     
- Misses       14955   14963      +8     

see 3 files with indirect coverage changes

🚀 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.