🔐 OIDC back-channel logout (#521)

* feat: oidc backchannel session storage
* feat: oidc backchannel logout
* ref: e2e test
* 🛠️ Code review
* ♻️ Do not mock internal auth token but call "/login" with oidc_token instead
* ♻️ Refactoring for back-channel logout test
* fix: feedback and e2e tests
* feat: more e2e tests
* ♻️ Added test to test multiple login requests flow
* ref: jwt sid verifier and e2e tests

---------

Co-authored-by: Monta <monta@HP-ProBook-445-14-inch-G9-Notebook-PC-505aadfc.localdomain>
Co-authored-by: Anton SHEPILOV <ashepilov@linagora.com>

tdrive/backend/node/config/default.json

@@ -9,7 +9,6 @@
       "mobile_googleplay": "https://play.google.com/store/apps/details?id=com.tdrive.tdrive&gl=FR"
     },
     "accounts": {
-      "_type": "remote",
       "type": "internal",
       "internal": {
         "disable_account_creation": false