[Backport 2.5] Add BWC tests for running against distribution bundle

[opensearch-trigger-bot]

Backport 027018e from #587

[codecov-commenter]

Codecov Report

Merging #599 (aeb1a81) into 2.5 (72adccb) will decrease coverage by 9.37%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.5     #599      +/-   ##
============================================
- Coverage     70.74%   61.36%   -9.38%     
  Complexity      112      112              
============================================
  Files           124       73      -51     
  Lines          3951     2472    -1479     
  Branches        630      265     -365     
============================================
- Hits           2795     1517    -1278     
+ Misses          976      778     -198     
+ Partials        180      177       -3     

Flag	Coverage Δ
dashboards-notifications	?
opensearch-notifications	61.36% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...s-notifications/public/pages/Channels/Channels.tsx
.../Emails/components/tables/SendersTableControls.tsx
...es/Channels/components/modals/MuteChannelModal.tsx
...blic/pages/CreateChannel/utils/validationHelper.ts
dashboards-notifications/server/utils/helper.ts
...ic/components/ContentPanel/ContentPanelActions.tsx
...CreateChannel/components/CustomWebhookSettings.tsx
...ic/pages/Emails/components/tables/SendersTable.tsx
...c/pages/CreateChannel/components/EmailSettings.tsx
...ateChannel/components/modals/CreateSenderModal.tsx
... and 41 more

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