Fatal error handling in pcv.transform.detect_color_card

[HaleySchuhl]

Describe the bug
It's possible for pcv.transform.detect_color_card to fatally error out, as was brought to our attention in issue #1606 .

To Reproduce
Steps to reproduce the behavior (including sample data and code really help):

1. Starting with image '...'
   IMG_9309.zip

2. Run function(s) '....'
   card_mask = pcv.transform.detect_color_card(rgb_img=img)

3. See error

106 corners = corners[np.argsort([math.dist(corner, corners[white_index]) for corner in corners])[[0, 1, 3, 2]]]
107 # Increment amount is arbitrary, cell distances rescaled during perspective transform

IndexError: index 7145 is out of bounds for axis 1 with size 6960

Expected behavior
Trigger the warning message that a color card couldn't be IDed? Is it valid to have a partial color card?

Local environment (please complete the following information):

• OS: [macOS]
• Environment [conda, dev]
• PlantCV Version [e.g. >4.3.0]

Additional context
Add any other context about the problem here.