🔧(conf) add server to server api tokens to common

We have the e2e test "it creates a doc server way"
that is quite complicated to run locally, because
it requires the `DJANGO_SERVER_TO_SERVER_API_TOKENS`
environment variable to be set in "env.d/development/common".
We moved `DJANGO_SERVER_TO_SERVER_API_TOKENS` from
"env.d/development/common.e2e.dist" to
"env.d/development/common.dist", by doing so,
this variable will be set by default in the
"env.d/development/common" file, the test will now run
without any additional configuration.

env.d/development/common.dist

@@ -62,5 +62,6 @@ COLLABORATION_SERVER_ORIGIN=http://localhost:3000
 COLLABORATION_SERVER_SECRET=my-secret
 COLLABORATION_WS_URL=ws://localhost:4444/collaboration/ws/
 
+DJANGO_SERVER_TO_SERVER_API_TOKENS=server-api-token
 Y_PROVIDER_API_BASE_URL=http://y-provider-development:4444/api/
 Y_PROVIDER_API_KEY=yprovider-api-key

env.d/development/common.e2e.dist

@@ -1,6 +1,5 @@
 # For the CI job test-e2e
 BURST_THROTTLE_RATES="200/minute"
 COLLABORATION_API_URL=http://y-provider:4444/collaboration/api/
-DJANGO_SERVER_TO_SERVER_API_TOKENS=test-e2e
 SUSTAINED_THROTTLE_RATES="200/hour"
 Y_PROVIDER_API_BASE_URL=http://y-provider:4444/api/

src/frontend/apps/e2e/__tests__/app-impress/doc-create.spec.ts

@@ -39,6 +39,7 @@ test.describe('Doc Create: Not logged', () => {
     browserName,
     request,
   }) => {
+    const SERVER_TO_SERVER_API_TOKENS = 'server-api-token';
     const markdown = `This is a normal text\n\n# And this is a large heading`;
     const [title] = randomName('My server way doc create', browserName, 1);
     const data = {
@@ -53,7 +54,7 @@ test.describe('Doc Create: Not logged', () => {
       {
         data,
         headers: {
-          Authorization: 'Bearer test-e2e',
+          Authorization: `Bearer ${SERVER_TO_SERVER_API_TOKENS}`,
           format: 'json',
         },
       },