Fix period-m cycling between the ideal ballooning eigenvalues

[rahulgaur104]

For the ideal ballooning objective we only use the maximum eigenvalue for a given field line. However, after becoming stable, the max eigenvalue can cycle between the most unstable and the second most unstable eigenvalue causing the optimizer to get stuck. The eigenvalues can also cycle between the first m most unstable eigenvalues.

Therefore, a static argument that allows the user to set the number of m most unstable eigenvalues to use during optimization would be useful.

[dpanici]

make new compute that returns all of the eigvals as flattened array, do logic inside of ObjectiveFunction compute (sum over pos, softmax, etc)