Multiline signature linter rule

[jsimnz]

No description provided.

[jsimnz]

discussion: #931 (comment)

[shahzadlone]

Prefer this:

func parseMutationOperationDefinition(
	schema gql.Schema,
	def *ast.OperationDefinition,
) (*request.OperationDefinition, error) {

Over this:

func parseMutationOperationDefinition(
	schema gql.Schema,
	def *ast.OperationDefinition) (*request.OperationDefinition, error) {
	

[shahzadlone]

I didn't find a linter that can do this, I found a linter that enforces a whitespace line after multi-line function signature but not what we want to achieve. Don't think writing a custom linter for this is worth it. The most helpful configuration to avoid this in general is provided by the GoLang editor where it enforces placing of ) on a new line after function parameter (An example of turning that option on can be found here: https://github.com/mittwald/golangci-lint-cfg).