chore(release): 4.4.0-alpha.0

[mcous]

Overview

This PR bumps the 4.4.0 release branch (#7900) to 4.4.0-alpha.0

Changelog

• App release notes
• OT-2 release notes

Review requests

• Release notes look good
• Change logs look good
  • Note: required manual intervention for fix(api): do not cache removed modules in thread_manager #7690 due to GitHub leading space issue in the commit message

Risk assessment

N/A

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release_4.4.0@ae16eab). Click here to learn what that means.
The diff coverage is n/a.

@@               Coverage Diff                @@
##             release_4.4.0    #7901   +/-   ##
================================================
  Coverage                 ?   83.36%           
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  Files                    ?      382           
  Lines                    ?    22711           
  Branches                 ?        0           
================================================
  Hits                     ?    18933           
  Misses                   ?     3778           
  Partials                 ?        0           

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[shlokamin]

LGTM