Fix `reset` UX for panel `title` and `description`

Summary

This PR proposes updates to the panel title flyout behavior to be more strict about changes to the title, including...

Input defaults to the actual title when empty (""), no longer fills with default viz title/description.
Uses the default title/description when the value is undefined, such that the value has never been set.
Adds a clear button to the title input.
Reset wording replaced with Reset to default, for title and description.
Only shows reset if there is a default non-empty title/description to reset to, applies mostly to by-value viz.
Changes the inspect panel title to always match the panel title and show "[No Title]" when empty.

https://github.com/elastic/kibana/assets/19007109/4ee2c045-bc07-4a7e-bff1-636bb60af08e

Checklist

[x] Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support

:green_heart: Build Succeeded

Buildkite Build
Commit: ad8e5db0a8c6671193eba6357583db49c0d0795f

Metrics [docs]

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
`@kbn/presentation-publishing`	161	163	+2

Async chunks

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

id	before	after	diff
`dashboard`	493.1KB	493.1KB	+23.0B
`ml`	4.2MB	4.2MB	+23.0B
total			+46.0B

Page load bundle

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

id	before	after	diff
`dashboardEnhanced`	17.7KB	17.7KB	+29.0B
`presentationPanel`	43.2KB	43.5KB	+260.0B
`savedObjects`	25.3KB	25.3KB	+7.0B
`urlDrilldown`	16.4KB	16.5KB	+23.0B
total			+319.0B

Unknown metric groups

#### API count | id | [before](https://github.com/elastic/kibana/commit/84777406db7e030b9a571788a5c02ccdffc7ffe1) | [after](https://github.com/elastic/kibana/commit/ad8e5db0a8c6671193eba6357583db49c0d0795f) | diff | | --- | --- | --- | --- | | `@kbn/presentation-publishing` | 192 | 194 | +2 |

History

:broken_heart: Build #209914 failed aa71302e258b30cfa8e0ffa9a75239d1176ea2e1
:broken_heart: Build #209774 failed 564eae60a04917fb64fcb5db8096212a26fe440c
:broken_heart: Build #209626 failed 89cb0b695d66af2ad668e2e7b47d50d6c0a072b0
:broken_heart: Build #209338 failed c1a0c5e22d669c4abd81b669cd272ac03fdf122f
:broken_heart: Build #208816 failed cae678f77783312aeef3bea615dddbea7d2cc709

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elastic / kibana