Fix the inadvertent swapping of the two utility functions for parsing sounds. While we're at it, streamline a few lines, remove a few C-style casts, and remove an unused function prototype.
Follow-up to #6314. Fixes a crash encountered by Inferno on 24.2-RC1.
* coverity - using `std::move` instead of copying, and change some parameters from value to reference
* coverity - fix or mark potential copy-paste mistakes
* coverity - various checking of parameter and return values
* coverity - miscellaneous fixes, and change some 'intentional' markers to 'false positive' markers
I took a close look at the code involved in parsing particle tables. There is no smoking gun, but there are several ways to polish the code which I have implemented here. The most likely culprits for the slowdown, IMO, are the repeated conversions between SCP_string and C-string, especially in `ParticleManager::getEffectByName()`; followed by the omission of `std::move` in several places.
This adds a new field to particle effects so that particle rotation can be configured on a per-type basis, not just on a blanket basis. Implements #5941.
The `SCP_string_lcase_equal_to()()` and `SCP_string_lcase_less_than()()` functors are rather unwieldy to use in non-functor situations, so this adds conventional function equivalents.
Goober5000