Improved user control over kernel and material coverage check

[jmeier]

Motivation

As per today, the kernel and material coverage check is "all" or "none":

[Problem]
  kernel_coverage_check = true|false
  material_coverage_check = true|false
[]

But fully switching off the coverage checks hinders debugging of Moose models. It would be nice to select subdomains to be checked or not to be checked.

Design

As discussed in #28092, it would be nice to have something like this:

kernel_coverage_check = true|on|false|off|skip_list|only_list     #(default is "true")
kernel_coverage_block_list = 'list of subdomains' 

and

material_coverage_check = true|on|false|off|skip_list|only_list     #(default is "true")
material_coverage_block_list = 'list of subdomains' 

With the additions options "skip_list" and "only_list" the user can exclude/include subdomains explicitly.

Impact

Only new functionality is added, but the type of kernel_coverage_check and material_coverage_check is to be changed to be an enum value. Due to fact, that the new enums also contain "true" and "false" (and "on" an "off") and the corresponding behaviour matches the behaviour today, the negative impact should be minimal.