This check was added for vcpkg, given how it packages Boost. However, we
don't need to run the check for other platforms, and it's quite slow.
So, scope it to VCPKG. On my machine, this reduces the time to run
`cmake -B build` from ~12 seconds, to ~6 seconds.
Fixes: #30787
faecca9a85c1c1917d024f55cca34d19cc94f3b9 test: Use span for raw data (MarcoFalke)
fac973647d69dd14089cee9972e8dfa0074c8a97 test: Use string_view for json_tests (MarcoFalke)
Pull request description:
The build system converts raw data into a C++ header file for tests.
This change modernizes the code to use the convenience wrappers `std::span` and `std::string_view`, so that redundant copies can be avoided.
ACKs for top commit:
fjahr:
re-ACK faecca9a85
TheCharlatan:
ACK faecca9a85c1c1917d024f55cca34d19cc94f3b9
stickies-v:
ACK faecca9a85c1c1917d024f55cca34d19cc94f3b9
hebasto:
ACK faecca9a85c1c1917d024f55cca34d19cc94f3b9, I have reviewed the code and the generated headers.
Tree-SHA512: 1f4951c54aff11ba27c41fb70f2821bdb79e06ca0abae734b970bd0d64dda9d8cced824a891fd51b3e9d4e5715ee9eb49ed5d369010a45eca7c3bec9f8641235
This change allows to drop brittle sizeof calls in favor of the
std::span::size method.
Other improvements include:
* Use of a namespace to mark test and bench data
* Use of the modern std::byte
* Drop of a no longer used std::vector copy and the bench/data module
