chore: minor C++ cleanups

[0ax1]

No description provided.

[0ax1]

Just to make the CMake version we use consistent.

[0ax1]

Note that this CMake file is not used for building only provided for people using CLion.

[codspeed-hq]

Merging this PR will improve performance by 11.36%

⚡ 1 improved benchmark
✅ 993 untouched benchmarks
⏩ 1515 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	map_each[BufferMut<i32>, 128]	858.1 ns	770.6 ns	+11.36%

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_{Comparing ad/c++cleanups (41c6067) with develop (d4aa567)}

Footnotes

1. 1515 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[myrrc]

rs_fields.resize(fields.size());
for (size_t i = 0; i < fields.size(); ++i)
    rs_fields[i] = fields[i];