refactor: don't duplicate AMD GPU temperature retrieval

[ClementTsang]

Description

A description of the change, what it does, and why it was made. If relevant (such as any change that modifies the UI), please provide screenshots of the changes:

We were pulling the AMD GPU temps twice, so this fixes that. This also avoids checking AMD GPU details if the card is asleep.

This change also capitalizes the first letter of temp labels.

Issue

If applicable, what issue does this address?

Closes: #

Testing

If relevant, please state how this was tested. All changes must be tested to work:

• Linux

Looks fine to me:

Checklist

If relevant, ensure the following have been met:

• Areas your change affects have been linted using rustfmt (cargo fmt)
• The change has been tested and doesn't appear to cause any unintended breakage
• Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
• The pull request passes the provided CI pipeline
• There are no merge conflicts
• If relevant, new tests were added (don't worry too much about coverage)

[codecov]

Codecov Report

Attention: Patch coverage is 18.66667% with 61 lines in your changes missing coverage. Please review.

Project coverage is 54.14%. Comparing base (f7d070f) to head (5549940).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/collection/amd.rs	4.54%	21 Missing ⚠️
src/collection/temperature/linux.rs	36.36%	21 Missing ⚠️
src/collection/linux/utils.rs	0.00%	18 Missing ⚠️
src/collection.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1682       +/-   ##
===========================================
+ Coverage   42.06%   54.14%   +12.07%     
===========================================
  Files         110      111        +1     
  Lines       17500    17441       -59     
===========================================
+ Hits         7362     9444     +2082     
+ Misses      10138     7997     -2141     

Flag	Coverage Δ
macos-14	37.71% <ø> (ø)
ubuntu-latest	56.60% <18.66%> (+12.73%)	⬆️
windows-2019	37.60% <ø> (ø)

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