Description of problem:

Vector is in CrashLoopBackOff when it's used the feature matchLabel containing character / as:

spec:
  inputs:
  - application:
      selector:
        matchLabels:
          local.test/logtype: user
    name: myAppLogData 

Version-Release number of selected component (if applicable):

$ oc get csv
NAME                            DISPLAY                            VERSION   REPLACES                        PHASE
cluster-logging.v5.6.5          Red Hat OpenShift Logging          5.6.5     cluster-logging.v5.6.4          Succeeded
 

How reproducible:

Always

Steps to Reproduce:

1. Configure the  CLO for using Vector as Log collector

   $ oc get clusterlogging instance -o yaml 
   apiVersion: logging.openshift.io/v1
   kind: ClusterLogging
   metadata:
     creationTimestamp: "2023-05-12T12:41:27Z"
     generation: 2
     name: instance
     namespace: openshift-logging
     resourceVersion: "8134555"
     uid: 28fcbd55-13b9-4f3e-861e-6211795ff1c9
   spec:
     collection:
       logs:
         type: vector
       type: vector
   

1.  Configure clusterLogForwarder to use `matchLabel` containing the character /

   $ oc get clusterlogforwarder instance -o yaml 
   apiVersion: logging.openshift.io/v1
   kind: ClusterLogForwarder
   [...]
   spec:
     inputs:
     - application:
         selector:
           matchLabels:
             local.test/logtype: user   
       name: myAppLogData
     pipelines:
     - inputRefs:
       - myAppLogData
       name: container-logs
       outputRefs:
       - default
   [...]
   

1. Check the Vector collector pods in CrashLoopbackoff status:

   $ oc get pods -l component=collector
   NAME              READY   STATUS             RESTARTS        AGE
   collector-45pwm   1/2     CrashLoopBackOff   6 (4m37s ago)   10m
   collector-czssk   1/2     CrashLoopBackOff   6 (4m43s ago)   10m
   collector-dv8xf   1/2     CrashLoopBackOff   6 (4m42s ago)   10m
   collector-mghps   1/2     CrashLoopBackOff   6 (4m49s ago)   10m
   collector-vp7nh   1/2     CrashLoopBackOff   6 (4m45s ago)   10m
   collector-zkf48   1/2     CrashLoopBackOff   6 (4m48s ago)   10m
   

1. Check the error given in the collectors related to the matchLabel

   $ oc logs collector-45pwm 
   Defaulted container "collector" out of: collector, logfilesmetricexporter
   2023-05-12T12:54:21.368864Z  WARN vector::config::loading: Transform "route_container_logs._unmatched" has no consumers
   2023-05-12T12:54:21.368892Z  WARN vector::config::loading: Transform "route_application_logs._unmatched" has no consumers
   2023-05-12T12:54:21.417131Z ERROR vector::topology: Configuration error. error=Transform "route_application_logs": 
   error[E701]: call to undefined variable
     ┌─ :1:31
     │
   1 │ .kubernetes.labels.local.test/logtype == "user"
     │                               ^^^^^^^
     │                               │
     │                               undefined variable
     │                               did you mean "true"?
     │
     = see language documentation at https://vrl.dev
   
   error[E100]: unhandled error
     ┌─ :1:1
     │
   1 │ .kubernetes.labels.local.test/logtype == "user"
     │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     │ │
     │ expression can result in runtime error
     │ handle the error case to ensure runtime success
     │
     = see documentation about error handling at https://errors.vrl.dev/#handling
     = learn more about error code 100 at https://errors.vrl.dev/100
     = see language documentation at https://vrl.dev
   

Actual results:

Vector pods are in continuous `CrashLoopBackOff` status

Expected results:

Vector pods run and they are configured to collecting only the logs for the pods matching the `matchLabel`.

Additional info: