Add detailed nHCal geometry version using LFHCAL constructor

[lkosarz]

Briefly, what does this PR introduce?

Adds a new detailed nHCal geometry implementation using LFHCAL constructor. Small update to the constructor.

Changed the cover plate material from Steel235 to be picked up based on absorber layers

What kind of change does this PR introduce?

• [ ] Bug fix (issue #__)
• [x] New feature (issue #__)
• [ ] Documentation update
• [ ] Other: __

Please check if this PR fulfills the following:

• [ ] Tests for the changes have been added
• [ ] Documentation has been added / updated
• [x] Changes have been communicated to collaborators

Does this PR introduce breaking changes? What changes might users need to make to their code?

Does this PR change default behavior?