Add better error handling for locate_dofs_topological

[jorgensd]

Resolves #4010

[schnellerhase]

Suggested change

	if (num_entities_local <= e)
	if (num_entities_local <= e) [[unlikely]]

Maybe good to add here.

[jorgensd]

I don't think it will yield an optimization here, as there is no else-case, and there is no performance critical operation happening within the if test.

At least I get the same machine code for both GCC and clang with:

#include<vector>
#include<cstdint>
#include<stdexcept>

int test (std::int32_t max_size)
{
    std::vector<std::int32_t> a;
    for (auto ai: a)
    {
    if (ai >=max_size) [[likely]]
    // if (ai >=max_size) [[unlikely]]
    {
        throw std::runtime_error("error");
    }
    auto z = ai + 1;
    }
    return 0;

}