Expose rand number to openmc.lib

[shimwell]

Description

Exposing the cpp random number to openmc lib

Fixes # (issue)

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)

[coveralls]

Pull Request Test Coverage Report for Build 19833107478

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 10 of 10 (100.0%) changed or added relevant lines in 3 files are covered.
• 24 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.6%) to 82.073%

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Files with Coverage Reduction	New Missed Lines	%
openmc/model/funcs.py	7	91.74%
openmc/dagmc.py	17	89.69%

Totals
Change from base Build 19628188522:	0.6%
Covered Lines:	54908
Relevant Lines:	64048

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💛 - Coveralls