Catch compilation fails with LLVM 15

[kevinushey]

From r-lib/isoband#31.

/usr/local/clang-trunk0/bin/clang++ -std=gnu++14 -I"/data/gannet/ripley/R/R-clang-trunk/include" -DNDEBUG -I../inst/include -DCOMPILING_TESTTHAT  -isystem /usr/local/clang-trunk/include    -fpic  -O3 -Wall -pedantic -frtti  -c test-runner.cpp -o test-runner.o
In file included from test-runner.cpp:7:
In file included from ../inst/include/testthat.h:1:
In file included from ../inst/include/testthat/testthat.h:65:
In file included from ../inst/include/testthat/vendor/catch.h:377:
In file included from /usr/local/clang-trunk0/bin/../include/c++/v1/sstream:186:
In file included from /usr/local/clang-trunk0/bin/../include/c++/v1/istream:165:
In file included from /usr/local/clang-trunk0/bin/../include/c++/v1/ostream:168:
In file included from /usr/local/clang-trunk0/bin/../include/c++/v1/bitset:128:
In file included from /usr/local/clang-trunk0/bin/../include/c++/v1/string:551:
In file included from /usr/local/clang-trunk0/bin/../include/c++/v1/string_view:222:
In file included from /usr/local/clang-trunk0/bin/../include/c++/v1/algorithm:1851:
In file included from /usr/local/clang-trunk0/bin/../include/c++/v1/__algorithm/ranges_sample.h:13:
In file included from /usr/local/clang-trunk0/bin/../include/c++/v1/__algorithm/sample.h:18:
/usr/local/clang-trunk0/bin/../include/c++/v1/__random/uniform_int_distribution.h:235:5: error: static assertion failed due to requirement '__libcpp_random_is_valid_urng<Catch::RandomNumberGenerator, void>::value': 
    static_assert(__libcpp_random_is_valid_urng<_URNG>::value, "");
    ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/clang-trunk0/bin/../include/c++/v1/__algorithm/shuffle.h:154:35: note: in instantiation of function template specialization 'std::uniform_int_distribution<long>::operator()<Catch::RandomNumberGenerator>' requested here
            difference_type __i = __uid(__g, _Pp(0, __d));
                                  ^
/usr/local/clang-trunk0/bin/../include/c++/v1/__algorithm/shuffle.h:166:14: note: in instantiation of function template specialization 'std::__shuffle<std::_ClassicAlgPolicy, std::__wrap_iter<Catch::TestCase *>, std::__wrap_iter<Catch::TestCase *>, Catch::RandomNumberGenerator &>' requested here
  (void)std::__shuffle<_ClassicAlgPolicy>(
             ^
../inst/include/testthat/vendor/catch.h:7189:18: note: in instantiation of function template specialization 'std::shuffle<std::__wrap_iter<Catch::TestCase *>, Catch::RandomNumberGenerator &>' requested here
            std::shuffle( vector.begin(), vector.end(), rng );
                 ^
../inst/include/testthat/vendor/catch.h:7207:44: note: in instantiation of function template specialization 'Catch::RandomNumberGenerator::shuffle<std::vector<Catch::TestCase>>' requested here
                    RandomNumberGenerator::shuffle( sorted );
                                           ^
1 error generated.
make: *** [/data/gannet/ripley/R/R-clang-trunk/etc/Makeconf:183: test-runner.o] Error 1
ERROR: compilation failed for package ‘testthat’