Re-add session restore for IAM

Author: liramon1

packages/core/src/codewhisperer/util/authUtil.ts

@@ -134,7 +134,7 @@ export class AuthUtil implements IAuthProvider {
             if (!this.isConnected()) {
                 // Try to restore an IAM session
                 this.session = new IamLogin(this.profileName, this.lspAuth, this.eventEmitter)
-                // await this.session.restore()
+                await this.session.restore()
                 if (!this.isConnected()) {
                     // If both fail, reset the session
                     this.session = undefined