Update test input files to use ParsedFunction's expression param

[nmnobre]

Refs idaholab/moose#31619.

[cticenhour]

Thanks @nmnobre! I have kicked off testing. Won't be able to get to a review until Monday. That alright?

[moosebuild]

Job Documentation, step Sync to remote on fc4b5fe wanted to post the following:

View the site here

This comment will be updated on new commits.

[nmnobre]

Thanks @nmnobre! I have kicked off testing. Won't be able to get to a review until Monday. That alright?

Of course :), it'll take a while until all other apps are updated as well anyway, which in turn means the MOOSE PR won't be merged anytime soon.

[gsgall]

Thanks for taking care of this @nmnobre!

I also see that the vars and vals parameters are also deprecated in the MooseParsedFunctionBase object. Should we take care of updating those in this PR or save that for a different one?

[nmnobre]

Should we take care of updating those in this PR or save that for a different one?

I was thinking maybe I'd do that in a subsequent batch of PRs across MOOSE and all apps again? This one was already a bit more complex than usual because I had to make sure I didn't mess up the indentation for multiline expressions.

[cticenhour]

Thanks @nmnobre!