OIDC: persist refresh token (#11249)

* test persistCredentials without a pickle key

* test setLoggedIn with pickle key

* lint

* type error

* extract token persisting code into function, persist refresh token

* store has_refresh_token too

* pass refreshToken from oidcAuthGrant into credentials

* rest restore session with pickle key

* comments

* prettier

* Update src/Lifecycle.ts

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* comments

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Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

src/MatrixClientPeg.ts

@@ -56,6 +56,7 @@ export interface IMatrixClientCreds {
     userId: string;
     deviceId?: string;
     accessToken: string;
+    refreshToken?: string;
     guest?: boolean;
     pickleKey?: string;
     freshLogin?: boolean;