DISPATCH-2121 Allow the -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON build option without warning

[jiridanek]

CMake Warning (dev) at router/CMakeLists.txt:35 (add_executable):
  Policy CMP0069 is not set: INTERPROCEDURAL_OPTIMIZATION is enforced when
  enabled.  Run "cmake --help-policy CMP0069" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.

  INTERPROCEDURAL_OPTIMIZATION property will be ignored for target
  'qdrouterd'.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.59%. Comparing base (25360c6) to head (a6a5c72).
⚠️ Report is 195 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1331      +/-   ##
==========================================
- Coverage   84.65%   84.59%   -0.07%     
==========================================
  Files         113      113              
  Lines       28383    28385       +2     
==========================================
- Hits        24029    24013      -16     
- Misses       4354     4372      +18     

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