fix(ownership): replace Velocity references

Update repository code ownership and Backstage catalog ownership to Infra so ownership metadata reflects the current team.

Ticket: INF-4017
Session-Id: f975fd7c-c9ae-43af-a926-6363d67e74fb
Task-Id: e996d552-1b18-4254-9cb9-1977c6a4c4d8

Author: therealdwright

.github/CODEOWNERS

@@ -1 +1 @@
-* @BitGo/velocity
+* @BitGo/infra

catalog-info.yaml

@@ -12,4 +12,4 @@ spec:
   # role is most significant. Valid values: service, library, website, documentation, other.
   type: other
   lifecycle: production
-  owner: group:velocity
+  owner: group:infra