Confluence connector config for URL is confusing

[seanstory]

Bug Description

When creating a native confluence connector, you're prompted to fill in the Confluence URL Label
See: https://github.com/elastic/kibana/blob/d04318f047f1443ba57f9de9658fd3e48b922feb/src/platform/packages/shared/kbn-search-connectors/types/native_connectors.ts#L548

The Label part of that is unnecessary. The Connector Client just calls this the Confluence URL: https://github.com/elastic/connectors/blame/2f7a7477e76ad52102ddb43399d0707ad6351f46/connectors/sources/confluence.py#L512-L515

To Reproduce

1. Create a native Confluence Connector
2. Wonder WTF is a "Confluence URL Label"?

Expected behavior

• The label shouldn't have the word "Label"
• both the native and client options should have a tooltip to tell you what this should be

Environment

8.16, 8.17, 8.18, 9.x

came up during https://github.com/elastic/search-team/issues/9101

[artem-shelkovnikov]

@lorenabalan I see you self-assigned this. Do you wanna continue looking at this issue, or unassign?