[Data Explorer][Discover 2.0] Change to inspect icon and update hint msg

[ananzh]

Description

• Change expand icon to inspect icon

before

after

Issues Resolved

#4826

[codecov]

Codecov Report

Merging #4827 (7ca8c02) into feature/data-explorer (521f306) will decrease coverage by 0.14%.
Report is 11 commits behind head on feature/data-explorer.
The diff coverage is 75.72%.

❗ Current head 7ca8c02 differs from pull request most recent head 4f486e4. Consider uploading reports for the commit 4f486e4 to get more accurate results

@@                    Coverage Diff                    @@
##           feature/data-explorer    #4827      +/-   ##
=========================================================
- Coverage                  66.50%   66.37%   -0.14%     
=========================================================
  Files                       3289     3388      +99     
  Lines                      62821    64707    +1886     
  Branches                    9788    10302     +514     
=========================================================
+ Hits                       41782    42950    +1168     
- Misses                     18658    19295     +637     
- Partials                    2381     2462      +81     

Flag	Coverage Δ
Linux_1	34.91% <82.00%> (?)
Linux_2	55.13% <77.22%> (?)
Linux_3	43.99% <81.63%> (?)
Linux_4	35.10% <82.00%> (?)
Windows	?
Windows_1	34.92% <82.00%> (?)
Windows_2	55.10% <77.22%> (?)
Windows_3	43.99% <81.63%> (?)
Windows_4	35.10% <82.00%> (?)

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

Files Changed	Coverage Δ
packages/osd-babel-preset/node_preset.js	100.00% <ø> (ø)
...osd-opensearch-archiver/src/lib/docs/test_stubs.ts	68.75% <ø> (ø)
...ch-archiver/src/lib/indices/create_index_stream.ts	69.76% <ø> (ø)
...ch-archiver/src/lib/indices/delete_index_stream.ts	50.00% <ø> (ø)
...ver/src/lib/indices/opensearch_dashboards_index.ts	0.00% <0.00%> (ø)
packages/osd-pm/src/utils/package_json.ts	66.66% <ø> (ø)
packages/osd-ui-shared-deps/theme.ts	41.66% <0.00%> (ø)
src/core/public/chrome/chrome_service.mock.ts	100.00% <ø> (ø)
...c/core/public/chrome/ui/header/collapsible_nav.tsx	95.45% <ø> (+0.90%)	⬆️
src/core/public/chrome/ui/header/header.tsx	75.00% <ø> (+1.66%)	⬆️
... and 37 more

... and 312 files with indirect coverage changes

[ashwin-pc]

I'm good with this going as is but I dont think the icon needs to toggle between the two states. We can follow up with that in a future PR unless you want to address it here :)

[ashwin-pc]

This icon does not need to toggle between inspect and minimize