Update Ecto from 3.9 to 3.11

[IvanIvanoff]

Changes

Updating it requries an update to the Clickhousex driver. The reason is
that Ecto changed how the scheme argument is handled, so now we need to
explicitly convert it from string to atom before passing it to
Mint.HTTP.connect/4

Ticket

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have tried to find clearer solution before commenting hard-to-understand parts of code
• I have added tests that prove my fix is effective or that my feature works