[7.x] [esaggs][inspector]: Refactor to prep for esaggs move to server. (#83199)

[lukeelmers]

Backports the following commits to 7.x:

• [esaggs][inspector]: Refactor to prep for esaggs move to server. ([esaggs][inspector]: Refactor to prep for esaggs move to server. #83199)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: a2d2e3b

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
data	598	600	+2
inspector	60	61	+1
total			+3

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
data	245.4KB	245.5KB	+2.0B
inspector	39.3KB	39.5KB	+242.0B
maps	2.8MB	2.8MB	+138.0B
total			+382.0B

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
data	968.6KB	971.5KB	+3.0KB
inspector	50.2KB	52.4KB	+2.2KB
total			+5.2KB

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream