Prescribed condition with particles

[lhy11009]

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This PR extends the InitialComposition particle property plugin to support updates from the prescribed solution framework during particle property updates. For each particle, the plugin queries the active prescribed solution plugins using the existing constrain_solution() interface and overwrites only those compositional components that are actively constrained, leaving all other stored values unchanged.

This might be a little tricky in terms of implementation, but it would be useful to bridge the current gap between the particle method and the prescribed solution.

The tricky part is that this is not actually a constraint that is applied to the solution; rather, this is a hard fix to the recorded compositions of the particles.

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[lhy11009]

@gassmoeller @danieldouglas92 , maybe you two can take a look and decide whether this is the way, given your familiarity with the original PRs of the prescribed solution.

[danieldouglas92]

@lhy11009 Nice addition and this looks good to me! The spherical sinker test failing seems to be unrelated to your changes and is failing in other PR's as well. Just one minor comment and I think this is good to go

[lhy11009]

@danieldouglas92 Great! Thanks for your review. I have committed the change.