adding mesh tally amalgamation algorithm

[magnoxemo]

Description

This PR implements the mesh tally amalgamation algorithm.

If the user wants to do mesh tally amalgamation from cardinal side they will set the _amalgamation = true. Then It will create a hash map of elements point to the first element of the cluster. If any element isn't part of a cluster it will point to itself.

If a reaction happens in any of the element of a cluster, when OpenMC quires the libMesh mesh for tallying it will send the bin we have at the first element in that cluster(using the hash map) . From cardinal side then, the tally score from the first element will be pulled and stored in the all elements in the cluster.

closes #3552

Checklist

• I have performed a self-review of my own code
• I have run clang-format (version 15) on any C++ source files (if applicable)
• I have followed the style guidelines for Python source files (if applicable)
• I have made corresponding changes to the documentation (if applicable)
• I have added tests that prove my fix is effective or that my feature works (if applicable)

more about this is here PR

[magnoxemo]

primary result from Cardinal side:

We will cluster elements together for tallying if the previous OpenMC solution has

• higher relative error and
• Almost the same flux (relative error between two adjacent bin 0.001)

OpenMC run 1:

amlgamating elements for tallying together:

OpenMC solution after mesh tally amalgamation:

I think it's ready for review