FindBoost: Add support for Boost 1.87

Update the list of known versions.

Run the command

    cmake -DBOOST_DIR=/path/to/boost_1_87_0 \
      -P Utilities/Scripts/BoostScanDeps.cmake

to extract dependencies from the 1.87.0 source tree.

Dependencies differ from 1.86:

* Boost.Log no longer depends on Boost.Chrono

Fixes: #26562