This commit fixes 2 problems with our OIDC flow in the UI, the first is straightforwards, the second is relatively more in depth:
1: A typo (1.10.1 only)
During #10503 we injected our settings service into the our oidc-provider service, there are some comments in the PR as to the whys and wherefores for this change (https://github.com/hashicorp/consul/pull/10503/files#diff-aa2ffda6d0a966ba631c079fa3a5f60a2a1bdc7eed5b3a98ee7b5b682f1cb4c3R28)
Fixing the typo so it was no longer looking for an unknown service (repository/settings > settings)
fixed this.
2: URL encoding (1.9.x, 1.10.x)
TL;DR: /oidc/authorize/provider/with/slashes/code/with/slashes/status/with/slashes should be /oidc/authorize/provider%2Fwith%2Fslashes/code%2Fwith%2Fslashes/status%2Fwith%2Fslashes
When we receive our authorization response back from the OIDC 3rd party, we POST the code and status data from that response back to consul via acallback as part of the OIDC flow. From what I remember back when this feature was originally added, the method is a POST request to avoid folks putting secret-like things into API requests/URLs/query params that are more likely to be visible to the human eye, and POSTing is expected behaviour.
Additionally, in the UI we identify all external resources using unique resource identifiers. Our OIDC flow uses these resources and their identifiers to perform the OIDC flow using a declarative state machine. If any information in these identifiers uses non-URL-safe characters then these characters require URL encoding and we added a helper a while back to specifically help us to do this once we started using this for things that required URL encoding.
The final fix here make sure that we URL encode code and status before using them with one of our unique resource identifiers, just like we do with the majority of other places where we use these identifiers.
