v8.16.0

ModelingToolkit v8.16.0

Diff since v8.15.2

Merged pull requests:

• refactor simplification and generate_control_function (#1680) (@baggepinnen)
• Use new dependent array variable convention (#1681) (@shashi)
• Fix export warning (#1686) (@YingboMa)
• Always use reshape to prevent misformat (#1687) (@YingboMa)
• Clarify usage intent of tunable metadata (#1689) (@baggepinnen)
• Fix dimension mismatch and wrong equation in linearize (#1691) (@baggepinnen)
• Backwards compatibility for calling convention (#1694) (@shashi)