AArch64 SYS instruction operands

[adamjseitz]

This PR fixes issues outlined in #1856.

• Populate the skipped ARM64_OP_SYS type operands into the operands array
• Use a single enum type for all sys type operands - resolves inconsistencies between C and bindings and among the different operand types (see the issue for more details)

Please note that I believe that this is a breaking API change due to reworking the SYS operand enums.

[adamjseitz]

I've added a test under suite/regress, modeled after the one added in #1840, but I could not find where these run in the GitHub Actions configuration, if at all, so I am concerned that these regression tests might not actually be running.

Let me know if there is a better place to be putting these sorts of tests, or if I should investigate adding these to the GitHub Actions configuration.

[kabeor]

great work！Plz add #1843 #1856 to https://github.com/capstone-engine/capstone/blob/next/suite/cstest/issues.cs . thx

[kabeor]

Really cool, thx!