Fix compat with doctrine/mongodb-odm 2.11

[mbabker]

doctrine/mongodb-odm#2738 changed from spl_object_hash() to spl_object_id() in the UoW and changed some typehints on internal methods.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.45%. Comparing base (ea1d375) to head (3eda25c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2945      +/-   ##
==========================================
+ Coverage   78.43%   78.45%   +0.01%     
==========================================
  Files         168      168              
  Lines        8806     8813       +7     
==========================================
+ Hits         6907     6914       +7     
  Misses       1899     1899              

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[mbabker]

@phansys @franmomu Sorry for the ping but would one of you be able to help with the PR backlog? At least for PRs like this one, #2966 (another compat issue), and #2958 (dealing with the soft-delete changes in the last release).

[phansys]

Thank you @mbabker!