golangci-lint: enable some presets, skip autogen

1. Skip go code which is autogenerated.

2. In addition to the default set of enabled linters, enable
   some more, from the following presets:
 - bugs
 - performance
 - unused
 - format

This actually enables the following additional linters:
 - asciicheck
 - bodyclose
 - errorlint
 - exhaustive
 - exportloopref
 - gofmt
 - gofumpt
 - goimports
 - gosec (gas)
 - makezero
 - maligned
 - noctx
 - prealloc
 - rowserrcheck
 - scopelint
 - sqlclosecheck
 - unparam

Signed-off-by: Kir Kolyshkin <[email protected]>

.golangci.yml

@@ -0,0 +1,12 @@
+run:
+  skip_dirs:
+    - rpc
+    - stats
+
+linters:
+  disable-all: false
+  presets:
+    - bugs
+    - performance
+    - unused
+    - format