[Backport 2.x] [MD] Make text content dynamically translated & update unit tests

[opensearch-trigger-bot]

Backport 9a55e0c from #2570

[codecov-commenter]

Codecov Report

Merging #2571 (a4242e7) into 2.x (7c1475f) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              2.x    #2571      +/-   ##
==========================================
- Coverage   66.71%   66.71%   -0.01%     
==========================================
  Files        3204     3202       -2     
  Lines       60964    60906      -58     
  Branches     9267     9267              
==========================================
- Hits        40671    40631      -40     
+ Misses      18074    18058      -16     
+ Partials     2219     2217       -2     

Impacted Files	Coverage Δ
.../public/components/create_button/create_button.tsx	100.00% <ø> (ø)
...ents/experimental_callout/experimental_callout.tsx	50.00% <ø> (-50.00%)	⬇️
...components/create_form/create_data_source_form.tsx	98.36% <100.00%> (+14.75%)	⬆️
...te_data_source_wizard/components/header/header.tsx	100.00% <100.00%> (ø)
...components/data_source_table/data_source_table.tsx	100.00% <100.00%> (+3.17%)	⬆️
...omponents/validation/datasource_form_validation.ts	100.00% <100.00%> (ø)
...nent/experimental_callout/experimental_callout.tsx
...ic/application/models/sense_editor/sense_editor.ts	64.88% <0.00%> (+0.88%)	⬆️
packages/osd-optimizer/src/node/cache.ts	52.77% <0.00%> (+2.77%)	⬆️
... and 4 more

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