release: 154.0.0

[FrederikBolding]

This is the release candidate for 154.0.0. It only includes one fix.

---

Note

Low Risk
Low risk release bookkeeping only: version bumps and changelog entries, with no functional code changes in this diff.

Overview
Updates the monorepo version to 154.0.0 and bumps @metamask/snaps-controllers to 20.0.2.

Adds a 20.0.2 changelog entry for the single fix: increasing the iframe unload timeout, and updates changelog compare links accordingly.

^{Reviewed by Cursor Bugbot for commit d4ea86b. Bugbot is set up for automated code reviews on this repo. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.56%. Comparing base (671bd18) to head (d4ea86b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3972   +/-   ##
=======================================
  Coverage   98.56%   98.56%           
=======================================
  Files         429      429           
  Lines       12363    12363           
  Branches     1942     1942           
=======================================
  Hits        12185    12185           
  Misses        178      178           

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