Hello Gökhan Demirci,
Welcome to the MS Q&A platform.
The reason for seeing two tabular databases is that you selected "workspace server" and provided the analysis service name during the creation of the visual studio project.
So a new model database was created with a string attached to it(unique identifier). This is expected behavior when selecting the workspace server.
To avoid this database, please select Integrated Workspace.
Please see the screenshot below showing the difference between creating the visual studio project with an Integrated workspace vs workspace server.
Once you have created the visual studio project, please follow the below document to deploy a model from VS
https://learn.microsoft.com/en-us/azure/analysis-services/analysis-services-deploy
I hope this helps. Please let me know if you have any further questions.