Fix strand on arrows in horizontally flipped mode

[cmdcolin]

After the new glyph style (#2775) the arrows pointed the wrong way in horizontally flipped mode, this fixes it

[codecov]

Codecov Report

Merging #2877 (d809617) into main (d485541) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2877      +/-   ##
==========================================
+ Coverage   59.92%   59.93%   +0.01%     
==========================================
  Files         590      590              
  Lines       26573    26578       +5     
  Branches     6450     6455       +5     
==========================================
+ Hits        15923    15929       +6     
+ Misses      10346    10345       -1     
  Partials      304      304              

Impacted Files	Coverage Δ
...FeatureRenderer/components/ProcessedTranscript.tsx	87.32% <ø> (ø)
...svg/src/SvgFeatureRenderer/components/Segments.tsx	85.71% <ø> (ø)
...ns/svg/src/SvgFeatureRenderer/components/Arrow.tsx	100.00% <100.00%> (ø)
...ckages/core/pluggableElementTypes/RpcMethodType.ts	85.41% <0.00%> (+2.08%)	⬆️

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