feat(ocis): get rid of oidc-go dependency

Signed-off-by: jkoberg <jkoberg@owncloud.com>

go.mod

@@ -115,7 +115,6 @@ require (
 	google.golang.org/protobuf v1.34.2
 	gopkg.in/yaml.v2 v2.4.0
 	gotest.tools/v3 v3.5.1
-	stash.kopano.io/kgol/oidc-go v0.3.4
 	stash.kopano.io/kgol/rndm v1.1.2
 )
 
@@ -352,7 +351,6 @@ require (
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240528184218-531527333157 // indirect
 	gopkg.in/cenkalti/backoff.v1 v1.1.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
-	gopkg.in/square/go-jose.v2 v2.6.0 // indirect
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect