[Enhancement] Usability with switching tenants

[arunx2]

Is your feature request related to a problem? Please describe.

The tenant information is visible anywhere on the home screen of the Dashboards. To know the tenant, I need to click on my profile icon in the top-right corner. And to switch tenants, multiple clicks required, there is no search for tenants, and select the tenant from the list of tenants.

Describe the solution you'd like

A tenant indication icon just besides a home screen or anywhere in the top banner. I should be able to search and select the available tenant by clicking the indication icon.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

[kavilla]

Issue moved to opensearch-project/security-dashboards-plugin #1431.