Add and tighten tols log tests

[ckormanyos]

Improve logarithm tests with tighter tolerances and a small set of added tests.
This follows-up and is based on improvements from #1468.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.6%. Comparing base (f694b0e) to head (79c2580).

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #1470     +/-   ##
=========================================
+ Coverage     98.6%   98.6%   +0.1%     
=========================================
  Files          307     307             
  Lines        25705   25733     +28     
  Branches      2203    2205      +2     
=========================================
+ Hits         25340   25368     +28     
  Misses         365     365             

Files with missing lines	Coverage Δ
test/test_log.cpp	100.0% <100.0%> (ø)
test/test_log10.cpp	100.0% <100.0%> (ø)

---

Continue to review full report in Codecov by Harness.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f694b0e...79c2580. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.