Add delete DB button to Databases Table

[artemmufazalov]

Figma: https://nda.ya.ru/t/mzzHWPCO7BwfE3

To Databases table add column with dropdown with Connect, Edit and Remove options

[artemmufazalov]

"Connect to DB" looks not very clear in current dropdown - it's just snippet with connection string, while other options are DB can change DB, issue to improve idea and to add it to UI: #2099

Edit will be added in a separate issue: #2096

[artemmufazalov]

Github PR: #2087
Arcadia PR: https://nda.ya.ru/t/tEbtn1Tv7DKDj6