[Tests] Further improvements

100% Test coverage of details

(Only new or refactored modules are listed)

file	coverage	covered	Done
arch/LoongArch/LoongArchMapping.c	67.29%	144 / 214	No
arch/PowerPC/PPCMapping.c	72.78%	254 / 349	No
arch/AArch64/AArch64Mapping.c	60.47%	918 / 1518	No
arch/TriCore/TriCoreMapping.c	45.00%	45 / 100	No
arch/Alpha/AlphaMapping.c	86.08%	68 / 79	No
arch/ARM/ARMMapping.c	61.68%	792 / 1284	No
arch/HPPA/HPPAMapping.c	29.85%	20 / 67	No

• Add workflow checking for test coverage.

API integration tests

• Make API integration tests actual tests (not just printing to stdout)

Fuzzer

• https://github.com/capstone-engine/capstone/issues/2454

Others

• https://github.com/capstone-engine/capstone/issues/2438
• https://github.com/capstone-engine/capstone/issues/2368