Add single BH control system

[knelli2]

Proposed changes

Controls object to the origin of the domain.

Upgrade instructions

Must now specify a Translation: control system in EvolveGhSingleBlackHole input files.

Code review checklist

• The code is documented and the documentation renders correctly. Run
  make doc to generate the documentation locally into BUILD_DIR/docs/html.
  Then open index.html.
• The code follows the stylistic and code quality guidelines listed in the
  code review guide.
• The PR lists upgrade instructions and is labeled bugfix or
  new feature if appropriate.

Further comments

[wthrowe]

These don't do anything useful because the class is entirely defined in the hpp.

[wthrowe]

Did you want to turn this on?

[knelli2]

Squashed everything in

[wthrowe]

clang-tidy timed out for no obvious reason. Rerunning to see if it was some sort of glitch. If it still times out I'm not going to worry about it.

[knelli2]

@wthrowe I've seen clang-tidy time out on several PRs lately for what seems like no good reason (not that many files changed). I haven't tried to figure out why though

[wthrowe]

Sounds like you fixed it in #6282. Want to rebase to pick that up?

[knelli2]

I don't think #6282 was the issue as I'm pretty sure the clang-tidy timeouts were happening before I introduced that, but I rebased just in case.

[wthrowe]

Actually, looks like your fix broke it more. CI is spewing errors.

[wthrowe]

And then reporting itself as passed.

[wthrowe]

Looks like that fixed clang-tidy. One of the errors there is legitimate, but it wasn't introduced in this PR and we should get the fix in quickly, so I'm not going to worry about it.