linter: Enable gofumpt and run against codebase (#1848)

* linter: Enable gofumpt and run against codebase

* Address shazbert's nits

* gofumpt: Fix issues after rebase

exchanges/sharedtestvalues/sharedtestvalues.go

@@ -138,7 +138,6 @@ func ForceFileStandard(t *testing.T, pattern string) error {
 		}
 		return nil
 	})
-
 	if err != nil {
 		return fmt.Errorf("failed to walk directory: %w", err)
 	}