Log spam from Taskcluster API calls during optimization

[ahal]

I noticed that since Taskgraph 7.0.0, we're getting a lot of logspam like:

[task 2023-12-19T19:13:01.410Z] 2023-12-19 19:13:01,410 - WARNING - response body: {
[task 2023-12-19T19:13:01.410Z]   "code": "ResourceNotFound",
[task 2023-12-19T19:13:01.410Z]   "message": "Indexed task not found\n\n---\n\n* method:     findTask\n* errorCode:  ResourceNotFound\n* statusCode: 404\n* time:       2023-12-19T19:13:01.408Z",
[task 2023-12-19T19:13:01.410Z]   "requestInfo": {
[task 2023-12-19T19:13:01.410Z]     "method": "findTask",
[task 2023-12-19T19:13:01.410Z]     "params": {
[task 2023-12-19T19:13:01.410Z]       "indexPath": "project.glean.cache.head.taskgraph_upgrade.docker-images.v2.linux.hash.6efbc0e1bab58aa89baa4c8dc2537bc1d8e8a52f101ab9de3afee597fd5b87fc"
[task 2023-12-19T19:13:01.410Z]     },
[task 2023-12-19T19:13:01.410Z]     "payload": {},
[task 2023-12-19T19:13:01.410Z]     "time": "2023-12-19T19:13:01.408Z"
[task 2023-12-19T19:13:01.410Z]   }
[task 2023-12-19T19:13:01.410Z] }

In Decision task logs. This is due to:
4f364e6

We neglected to consider that during optimization, a 404 is totally expected and normal. This isn't really a "bug" per se, but we should find a way to fix this before upgrading Gecko to Taskgraph 7+, otherwise the logs are going to have 1000s of these.

[jcristau]

IMO we should revert #327. Sorry about this.