-Wno-deprecated-declarations needed to compile boost-1.89 with -Werror on

When upgrading from boost-1.86 to 1.89, got the following error when building my files that include boost headers:

```
In file included from src/ComputeStats.cpp:18:
In file included from /dsat/boost/rhel8_intel64_icpx/include/boost/multi_array.hpp
In file included from /dsat/boost/rhel8_intel64_icpx/include/boost/multi_array/base.hpp
/dsat/boost/rhel8_intel64_icpx/include/boost/multi_array/storage_order.hpp:51:18: error: 'assign' is deprecated: please use 'fill' instead [-Werror, -Wdeprecated-decratations]
51 | ascending_.assign(true);
|
/dsat/boost/rhel8_intel64_icpx/include/boost/multi_array/multi_array_ref.hpp:113:18: note: in instantiation of member function 'boost:general_storage_order<2>::general_storage_order' requested here
113 | base_(base), storage_(c_storage_order()) {
|
....
/dsat/boost/rhel8_intel64_icpx/include/boost/array.hpp:193:9: note: 'assign' has been explicitly marked deprecated here
193 | BOOST_DEPRECATED( "please use 'fill' instead" )
|
/dsat/boost/rhel8_intel64_icpx/include/boost/config/compiler/clang.hpp:346:46: note: expanded from macro 'BOOST_DEPRECATED'
346 | #define BOOST_DEPRECATED(msg) __attribute__((deprecated(msg)))
1 error generated
```

I can work around this by adding -Wno-deprecated-declarations to my cxx flags, but since this is internal to boost, I think it should be addressed. Thank you!