feat: Support thumbnails in ImageryView and ImageryTimeView

[ozyx]

Closes #5931

Describe your changes:

Prefer to use image thumbnail urls if provided via metadata in imageHistory and the imagery timestrip view.

The other half of this PR is implementing thumbnail support on the openmct-yamcs side (providing thumbnail URLs in metadata).

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• Have you followed the guidelines in our Contributing document?
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• Is this change backwards compatible? For example, developers won't need to change how they are calling the API or how they've extended core plugins such as Tables or Plots.

Author Checklist

• Changes address original issue?
• Tests included and/or updated with changes?
• Command line build passes?
• Has this been smoke tested?
• Testing instructions included in associated issue OR is this a dependency/testcase change?

Reviewer Checklist

• Changes appear to address issue?
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[codecov]

Codecov Report

Merging #6132 (8e9f582) into master (986c596) will increase coverage by 0.11%.
The diff coverage is 77.41%.

@@            Coverage Diff             @@
##           master    #6132      +/-   ##
==========================================
+ Coverage   54.73%   54.84%   +0.11%     
==========================================
  Files         602      602              
  Lines       24648    24728      +80     
  Branches     2220     2223       +3     
==========================================
+ Hits        13490    13563      +73     
- Misses      10544    10550       +6     
- Partials      614      615       +1     

Flag	Coverage Δ		*Carryforward flag
e2e-ci	39.49% <0.00%> (ø)		Carriedforward from 986c596
e2e-full	51.23% <93.75%> (ø)		Carriedforward from 986c596
e2e-stable	53.11% <94.73%> (+0.04%)	⬆️
unit	49.39% <66.66%> (+<0.01%)	⬆️

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
src/plugins/imagery/components/ImageThumbnail.vue	12.12% <ø> (ø)
src/plugins/imagery/components/ImageryView.vue	44.18% <54.54%> (+0.02%)	⬆️
src/plugins/imagery/components/ImageryTimeView.vue	77.27% <70.00%> (-0.89%)	⬇️
example/imagery/plugin.js	90.24% <83.33%> (+2.97%)	⬆️
src/plugins/imagery/mixins/imageryData.js	92.36% <100.00%> (+2.12%)	⬆️
src/plugins/charts/bar/BarGraphView.vue	54.49% <0.00%> (-3.00%)	⬇️
src/plugins/timeConductor/ConductorHistory.vue	52.47% <0.00%> (+0.99%)	⬆️
.../plugins/timeConductor/ConductorInputsRealtime.vue	51.19% <0.00%> (+1.19%)	⬆️
src/plugins/tabs/components/tabs.vue	36.00% <0.00%> (+1.60%)	⬆️
... and 1 more

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[akhenry]

Beautiful! No notes. Just needs a test.

Thanks!

[ozyx]

@akhenry Added thumbnail support to Example Imagery and updated/added unit and e2e tests