fix: content steering bug fixes and tests

[adrums86]

Description

This PR addresses a few content steering bugs and ads some additional testing around live DASH.

Specific Changes proposed

Refactoring the content steering initialization to attach listeners separately, change some queryBeforeStart behavior and an issue with the initial ttl value.

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

[codecov]

Codecov Report

Merging #1430 (5bb5282) into main (dd5e2af) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1430      +/-   ##
==========================================
+ Coverage   85.98%   86.06%   +0.07%     
==========================================
  Files          42       42              
  Lines       10428    10450      +22     
  Branches     2412     2416       +4     
==========================================
+ Hits         8967     8994      +27     
+ Misses       1461     1456       -5     

Files	Coverage Δ
src/content-steering-controller.js	99.44% <100.00%> (+0.01%)	⬆️
src/dash-playlist-loader.js	90.51% <100.00%> (-0.03%)	⬇️
src/playlist-controller.js	96.00% <100.00%> (+0.19%)	⬆️

... and 1 file with indirect coverage changes

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[wseymour15]

Great work!