Jira plugin fails to unmarshal errors from Jira API

[nklaassen]

Expected behavior:
When the Jira API returns errors we should log them or return them to the user

Current behavior:
We get a log like this, which isn't helpful when trying to debug the issue:

"caller":"jira/app.go:270","component":"jira","error":"json: cannot unmarshal object into Go struct field ErrorResult.Errors of type []string","level":"error","message":"Failed to process request","plugin_name":"jira","plugin_type":"jira"

here we configure the client to unmarshal errors into an ErrorResult, defined here

teleport/integrations/access/jira/types.go

Lines 23 to 26 in ddeec3d

	type ErrorResult struct {
	ErrorMessages []string `url:"errorMessages"`
	Errors []string `url:"errors"`
	}

ErrorResult.Errors there has type []string, but according to the schema from Jira it will be a JSON object. We should either fix the type of ErrorResult.Errors or just remove it and only use ErrorResult.ErrorMessages

Bug details:

• Teleport version
  • The hosted Jira plugin has been included in the Teleport repo since 14.0.0 with this incorrect schema, it was probably wrong before that too
• Recreation steps
  • Try to set up the hosted Jira plugin in a Cloud tenant
  • Make it return an error somehow, possibly by creating the Jira API token with the wrong permissions
• Debug logs