[Saved object management] Add ability to search content containing pipe character

[drewdaemon]

Describe the feature:
Right now we don't allow the pipe character when searching for content in the table list view or the saved objects management page.

Describe a specific use case for the feature:
We received internal feedback that this could be a useful thing to search for (for example, ES|QL could be in the title of a dashboard).

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)

[elasticmachine]

Pinging @elastic/appex-sharedux (Team:SharedUX)

[drewdaemon]

Not sure who should actually own this. Feel free to reassign.

[drewdaemon]

Now I see #151120 so I will change this issue to just cover saved object management.

[pgayvallet]

The SO management search bar is using EUI's Query syntax language under the hood (like the navigational search, and many other search fields in Kibana do for example). Therefore, special characters (as | is) must be escaped using double quotes around the terms.

Functionally, this is working as expected.

Now, we may want to more explicitly inform somewhere on the page that the search bar is using EUI's Query syntax and may want to link to its documentation.