Add fixes for building on macOS

[shkodm]

Supersedes #493

• -E in sed to be POSIX compliant
• Remove regex in find to make it more tolerable and portable
• find models/ produces extra slashes in results on macos ( i.e. models//multiphase/) but not on Linux. find models does not give extra slashes and behaves the same as find models/ on models

Tested on my M2 Macbook Air, all the clusters where I use TCLB, and my workstation.

@TravisMitchell FYI

I will also CI at some point, but not in this PR.

[llaniewski]

Could you verify also if things that are recommended for install here:
https://github.com/CFD-GO/TCLB/blob/master/tools/install.sh#L292
are in tune with what you have?

Also, I remember other people running TCLB on mac needed some paths changed, and back then I wrote this:
https://github.com/CFD-GO/TCLB/blob/master/tools/env.sh
Is this still needed?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f7f36f7) 35.14% compared to head (6024214) 39.63%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #495      +/-   ##
==========================================
+ Coverage   35.14%   39.63%   +4.48%     
==========================================
  Files         162      161       -1     
  Lines        6621     7178     +557     
==========================================
+ Hits         2327     2845     +518     
- Misses       4294     4333      +39     

Flag	Coverage Δ
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d3q27_PSM_NEBB	36.53% <ø> (?)
d3q27_pf_velocity	30.91% <ø> (?)

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[shkodm]

Also, I remember other people running TCLB on mac needed some paths changed, and back then I wrote this:
https://github.com/CFD-GO/TCLB/blob/master/tools/env.sh
Is this still needed?

I did not use it. Both in the script and in the tools/install.sh, gnu-sed and findutils are not needed, because macOS already ships those tools by default, and it is better not have random conflicts between them

Could you verify also if things that are recommended for install here:
https://github.com/CFD-GO/TCLB/blob/master/tools/install.sh#L292
are in tune with what you have?

I installed using the install.sh (and have all the packages that are installed there), but taking into the account the notice above. I don't think I did anything extra. When @TravisMitchell is going to install, he can verify.

[TravisMitchell]

Thanks @shkodm, it will be a couple weeks before I get the chance to test (lead time is on my mac is a bit slow) - but will let you know if anything else is needed for this.