Add pre: and post: action for cleaning up (#384)

* pre and post cleanup-cli

* exec azpath

* enable azure powershell part

* set user agent

* extract utils

* divide cleanup

* extract azpsconfig class

* fix test

* move runpsscript

* change to AzPSUtils

* fix typo

src/Cli/AzureCliLogin.ts

@@ -17,9 +17,6 @@ export class AzureCliLogin {
     async login() {
         core.info(`Running Azure CLI Login.`);
         this.azPath = await io.which("az", true);
-        if (!this.azPath) {
-            throw new Error("Azure CLI is not found in the runner.");
-        }
         core.debug(`Azure CLI path: ${this.azPath}`);
 
         let output: string = "";