[Security Solution] [Fix] Row Renderer + Notes in Flyout

[logeekal]

Summary

This PR introduces below mentioned 3 changes:

Row Renderer Switch

A quick switch to switch on/off all the row-renderers without going into settings.

[!Caution] This is only available with feature flag unifiedComponentsInTimelineEnabled

https://github.com/elastic/kibana/assets/7485038/88fcf4e0-a5a2-4158-bc86-b313002790ec

Notes in a separate Flyout

• Notes do not appear inline anymore. They are now part of separate Flyout.
• This Change also introduces a notification dot to highlight that existing notes are available.

https://github.com/elastic/kibana/assets/7485038/491e256f-36dc-42f3-89f3-4c8c90c969a5

Color Distinction between enabled/disabled Row Renderers.

Previously it was difficult to see what row renderers are available and what are not. This change introduces a small color distinction.

https://github.com/elastic/kibana/assets/7485038/ba250c4c-cb93-4bc7-b593-235ccaf207cb

Desk Testing

Please desk test following functionalities with AND without below feature flag:

1. Add Note
2. Cancel when adding note.
3. Create a new timeline
4. Load saved timeline
5. Change from one timeline to other
6. Open Timeline page directly with saved timeline in the address bar.

In all above scenarios row renders and notes should be shown as expected.

xpack.securitySolution.enableExperimental:
  - unifiedComponentsInTimelineEnabled