Support better secrets display

[yurikiselev]

Starting with YDB version 25-3, new secret-type schema objects were introduced. They need to be supported in the viewer.

1. Create a new favicon for secrets instead of the default directory-type.
2. In the Navigation tab, next to the ellipsis next to the secret,

• leave only the Copy path... option.
• add the "Drop secret..." option, which will open a query like

DROP SECRET `<secret name>`;

• add the "Alter secret..." option, which will open a query like

ALTER SECRET `<secret name>` WITH (value = '<cursor here>');

3. Hide the following tabs in the Diagnostics tab: Top shards, Nodes, and Info.
4. Improve queries suggest according to secrets syntax:

CREATE SECRET `name` WITH (VALUE = ''[, INHERIT_PERMISSIONS = TRUE]);
ALTER SECRET `name` WITH (VALUE = '');
DROP SECRET `name`;

VALUE and INHERIT_PERMISSIONS are parameters, hence should be processed in UI like parameters in CREATE ASYNC REPLICATION for example.

VALUE parameter is the only mandatory parameter, has bool type.
INHERIT_PERMISSIONS parameter is an optional parameter, has String type.