Add optional 'conclusion' argument to emitTelemetry

If present, will include the value of `conclusion` with the telemetry
POST body (gh/gh needs a separate PR to recognize this)

src/pre.js

@@ -22,11 +22,12 @@ async function emitTelemetry() {
   // All variables we need from the runtime are set in the Deployment constructor
   const deployment = new Deployment()
   const telemetryUrl = `${deployment.githubApiUrl}/repos/${deployment.repositoryNwo}/pages/telemetry`
-  core.info(`Sending telemetry for run id ${deployment.workflowRun}`)
+  const conclusion = core.getInput('conclusion') || null
+  core.info(`Sending telemetry for run id ${deployment.workflowRun}: ${conclusion}`)
   await axios
     .post(
       telemetryUrl,
-      { github_run_id: deployment.workflowRun },
+      { github_run_id: deployment.workflowRun, conclusion },
       {
         headers: {
           Accept: 'application/vnd.github.v3+json',

src/pre.test.js

@@ -17,6 +17,7 @@ describe('emitTelemetry', () => {
     process.env.GITHUB_ACTOR = 'monalisa'
     process.env.GITHUB_ACTION = '__monalisa/octocat'
     process.env.GITHUB_ACTION_PATH = 'something'
+    process.env.INPUT_CONCLUSION = 'success'
 
     jest.spyOn(core, 'setOutput').mockImplementation(param => {
       return param
@@ -47,7 +48,8 @@ describe('emitTelemetry', () => {
     expect(axios.post).toBeCalledWith(
       'https://api.github.com/repos/actions/is-awesome/pages/telemetry',
       {
-        github_run_id: process.env.GITHUB_RUN_ID
+        github_run_id: process.env.GITHUB_RUN_ID,
+        conclusion: 'success'
       },
       {
         headers: {