Confusing search query naming on admin pages

[Sabr1n4W]

Currently, the search query used when searching on admin pages (users index, roles index, ...) is named name.
This is confusing because the search query is not only applied for the name.

For example, when searching for users on the user index page the search applies to the firstname, lastname and email of the users.

Describe the solution you'd like
The search query should maybe be renamed to search or something similar to prevent confusion because of the naming.

Additional to this the search query naming should match the search query naming used on other pages (e.g. rooms index)