Add a way to compare resources

[kab163]

This compare function will compare 2 different resources.

I need this because Umpire would like to add a resource aware pool, but in order to do that we need to know if the resources that are being passed into the pool per allocate call are the same or different. (We handle each case differently.)

• Double check that my Omp compare is sufficient (see TODO statement)
• Add Doxygen comments to compare functions
• Test this with my resource aware pool prototype - this will act as another check to see if the compare function behave as expected.

[kab163]

@trws , @mdavis36 , @rhornung67 - Any ideas how to move forward here? The sycl and windows docker tests are complaining about ambiguous overloads.. I get an error message similar to:

D:\a\1\s\include\camp/resource.hpp(154,1): error C2666: 'camp::resources::v1::operator ==': 3 overloads have similar conversions
could be 'bool camp::resources::v1::operator ==(const camp::resources::v1::Host &,const camp::resources::v1::Host &)' [found using argument-dependent lookup]
or 'bool camp::resources::v1::operator ==<T,0x0>(const T &,const camp::resources::v1::Resource &)'

[rhornung67]

A couple of comments about comments. Plus, one earlier comment I made (about m_value in == operator comment) still to address. Otherwise, this looks good.

No more comments. 😄

[MrBurmark]

This should be above, and there should be a != test.