Update JWKS retrieval URLs to point to per-environment endpoints

[joshgarde]

EDL has updated their public JWKS endpoint to be authenticated and has offered alternatives that we need to update all environments to utilize. The change is currently live in URS OPS and will break all our deployments unless fixed soon.

Previous JWKS endpoint: https://urs.earthdata.nasa.gov/export_edl_jwks

New JWKS endpoints:

SIT: https://sit.urs.earthdata.nasa.gov/.well-known/edl_sit_jwks.json
UAT: https://uat.urs.earthdata.nasa.gov/.well-known/edl_uat_jwks.json
OPS: https://urs.earthdata.nasa.gov/.well-known/edl_ops_jwks.json

[joshgarde]

PR merged and deployed to all envs