Add array_ok to SubplotidValidator, used in pie.legend

[my-tien]

Description

Update SubplotidValidator to handle arrays of values.

Additional fix for closing #5463.

Changes

• Handle arrays in SubplotidValidator

• Added array_ok tests

Testing

• Be on main

• Run the following code:

  import plotly.graph_objects as go
  
  pie = go.Pie(
      labels=["A", "B", "C"],
      values=[65, 15, 20],
      legend=["legend", "legend2"],
  )
  
  fig = go.Figure([pie], go.Layout())
  fig.show()
  

• Note that a ValueError is raised

• Switch to this branch

• Run the same code again

• Note that chart is rendered correctly

Disclaimer

I am required to add that…

the software is provided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. in no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.

[my-tien]

FYI @camdecoster @emilykl

[camdecoster]

This looks good, but there a few small changes to make. Thanks for the PR!