Build issue with boost 1.83

[emollier]

Greetings,

As first identified in Debian bug #1056023, pirs is failing to build from source with boost 1.83 with error:

In file included from stat_soap_coverage.cpp:8:
/usr/include/boost/progress.hpp:23:3: error: #error This header is deprecated and will be removed. (You can define BOOST_TIMER_ENABLE_DEPRECATED to suppress this error.)

To buy us some time, I intend to build pirs with preprocessor option -DBOOST_TIMER_ENABLE_DEPRECATED, but according to boost timer documentation, switch away from the original timers to CPU timers should be the preferred option.

For information,
Étienne.