Upgrades to timer

[landinjm]

• Please check if the PR fulfills these requirements

• The PR follows our guidelines (formatting & style)
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Timer is now hierarchical so we get something like this when not using Caliper

=====================================================================================================
  PRISMS-PF Timing Summary
=====================================================================================================
Section                                                N Calls  Wall Time (s)  CPU Time (s)  % Parent
-----------------------------------------------------------------------------------------------------
PDEProblem                                                   1         15.402        22.243  100.000%
  |- Initialization                                          1          0.470         0.580    3.049%
    |- Create FESystem                                       1          0.000         0.001    0.065%
    |- Generate mesh                                         1          0.101         0.090   21.560%
    |- reinitialize DoFHandlers                              1          0.015         0.017    3.225%
    |- Create constraints                                    1          0.007         0.007    1.445%
    |- reinitialize matrix-free objects                      1          0.030         0.044    6.439%
    |- reinitialize solution set                             1          0.000         0.002    0.066%
    |- reinitialize invm                                     1          0.001         0.002    0.188%
    |- reinitialize element volumes                          1          0.000         0.000    0.001%
    |- compute element volumes                               1          0.005         0.007    1.123%
    |- Solver initialization                                 1          0.202         0.209   43.078%
    |- Update ghosts                                         1          0.000         0.000    0.001%
    |- Auxiliary solver                                      1          0.000         0.000    0.000%
    |- Nonexplicit linear solver                             1          0.000         0.000    0.000%
    |- Nonexplicit self-nonlinear solver                     1          0.000         0.000    0.000%
    |- Nonexplicit co-nonlinear solver                       1          0.000         0.000    0.000%
    |- Postprocess solver                                    1          0.004         0.005    0.800%
      |- Zero ghosts                                         1          0.000         0.000    0.122%
      |- Update ghosts                                       1          0.000         0.000    0.082%
    |- Output                                                1          0.103         0.195   21.946%
  |- Solve Increment                                      5000         14.030        14.581   91.090%
    |- Update time-dependent constraints                  5000          0.010         0.105    0.070%
    |- Explicit solver                                    5000         13.873        13.366   98.880%
      |- Zero ghosts                                      5000          0.017         0.143    0.121%
      |- Update ghosts                                    5000          0.008         0.022    0.059%
    |- Nonexplicit auxiliary solver                       5000          0.007         0.029    0.047%
    |- Nonexplicit linear solver                          5000          0.006         0.045    0.046%
    |- Nonexplicit self-nonlinear solver                  5000          0.007         0.062    0.047%
    |- Nonexplicit co-nonlinear solver                    5000          0.007         0.069    0.047%
    |- Postprocess solver                                    5          0.016         0.022    0.116%
      |- Zero ghosts                                         5          0.000         0.000    0.081%
      |- Update ghosts                                       5          0.000         0.000    0.055%
  |- Output                                                  5          0.432         0.925    2.805%
=====================================================================================================

Caliper is still better because it provides more information, but this will let our users see what eats of the most time in their simulation.

• What is the current behavior? (You can also link to an open issue here)
  Default deal.II output, which prints a flat unordered list at the end.

• What is the new behavior (if this is a feature change)?
  Hierarchical!

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)
  Nope

• Other information:
  Closes Organize timer class entries #664, Timer should format itself according to the width of the entries #823, Add scope guards to the timer #822, Organize timing information output by sections #351

[landinjm]

@fractalsbyx Any more additions that I should grab while working on this?

[fractalsbyx]

looks good other than spellcheck