Fix message in out.dat when a variable is at or below/above its lower/upper bounds

[clmould]

Description

Closes #3998
Before, the message printing if a variable was below its lower bounds it was using the scaled_upper_bounds array so the message was wrong in some cases before:

ixc = 18
boundl(18) = 3.0
boundu(18) = 4.0
q95 = 3.0

* TF Current per turn [A]
ixc = 60
boundl(60) = 65000.0
boundu(60) = 90000.0
c_tf_turn = 65000.0

Now it prints correctly:

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 45.89%. Comparing base (25480ae) to head (0878fca).

Files with missing lines	Patch %	Lines
process/scan.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4007      +/-   ##
==========================================
- Coverage   45.89%   45.89%   -0.01%     
==========================================
  Files         123      123              
  Lines       29064    29066       +2     
==========================================
  Hits        13340    13340              
- Misses      15724    15726       +2     

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