Improving typing of external row API

[mike12345567]

Description

Improving the typing around the ExternalRequest object, which has implications throughout the row API and SDK, cleaning up where possible based on it.

The main change here is making sure that Operation.READ has a specific response (as it already did) and all other operations have their own specific response (as they already did). The types just did not allow for this knowledge to be fully transferred through the layers, requiring some gymnastics when using the class.

Feature branch env

Feature Branch Link

[samwho]

Much clearer, thanks for sorting this Michael! 🙏

[codecov-commenter]

Codecov Report

Merging #12100 (5ff6b7a) into master (f9bff08) will increase coverage by 6.86%.
Report is 4 commits behind head on master.
The diff coverage is 100.00%.

❗ Current head 5ff6b7a differs from pull request most recent head a60690f. Consider uploading reports for the commit a60690f to get more accurate results

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@@            Coverage Diff             @@
##           master   #12100      +/-   ##
==========================================
+ Coverage   68.50%   75.37%   +6.86%     
==========================================
  Files         585      326     -259     
  Lines       21839    13904    -7935     
  Branches     4409     2931    -1478     
==========================================
- Hits        14961    10480    -4481     
+ Misses       6364     3198    -3166     
+ Partials      514      226     -288     

Files	Coverage Δ
.../server/src/api/controllers/row/ExternalRequest.ts	92.87% <100.00%> (+0.01%)	⬆️
...ackages/server/src/api/controllers/row/external.ts	93.75% <100.00%> (ø)
packages/server/src/sdk/app/rows/external.ts	80.00% <100.00%> (ø)
packages/server/src/sdk/app/rows/search.ts	100.00% <100.00%> (ø)
...ackages/server/src/sdk/app/rows/search/external.ts	86.45% <100.00%> (ø)
...ackages/server/src/sdk/app/rows/search/internal.ts	85.24% <100.00%> (-0.12%)	⬇️

... and 260 files with indirect coverage changes

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