Switch [OpenCollective] badges to use GraphQL and auth (#9387)

* [OpenCollective] update opencollective to api v2 (#9346)

* update opencollective to api v2

* fix tests

* fix: do not filter by accountType for opencollective/all

* remove 404

* remove required in schema

* cnt -> count

* keep by-tier code as-is

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Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

* allow calling OpenCollective api with an auth token

* add test for opencollective auth

* cache OpenCollective badges for longer

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Co-authored-by: xxchan <xxchan22f@gmail.com>
Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

core/server/server.js

@@ -184,6 +184,7 @@ const privateConfigSchema = Joi.object({
   obs_user: Joi.string(),
   obs_pass: Joi.string(),
   redis_url: Joi.string().uri({ scheme: ['redis', 'rediss'] }),
+  opencollective_token: Joi.string(),
   postgres_url: Joi.string().uri({ scheme: 'postgresql' }),
   sentry_dsn: Joi.string(),
   sl_insight_userUuid: Joi.string(),