Description of problem:
Velero 1.7 added a paging feature to ease the pressure on api-server on large list calls during backups. However, paging is not working because the list option that makes the actual paged request was getting overridden by a shadow variable without the options set.

Version-Release number of selected component (if applicable):
1.7

How reproducible:
Always

Steps to Reproduce:
1. Create 550 secrets in a namespace
2. Install 1.7 velero and configure a BSL
3. Take backup of the namespace with the secrets
4. Using oc adm node-logs --role=master --path=kube-apiserver/, look at the most recent audit log
5. Grep for secret list in all the nodes, as an example `$ oc adm node-logs ip-10-0-139-69.us-west-2.compute.internal  --path="kube-apiserver/audit.log" | grep 'list' | grep 'kube:admin'`. This query greps for all list requests coming from kube:admin service account since I ran velero logged in as kube:admin locally. Depending on how velero is running, the service account/user needs to be replaced there.


Actual results:
sh-4.4# cat  audit-2021-10-14T18-10-21.851.log  | grep system:serviceaccount:velero:velero-backup-dev-rcdn-01-server | grep secrets  | jq -cs '.[] | [ .stageTimestamp , .verb , .requestURI ]' 
["2021-10-14T18:01:09.620647Z","list","/api/v1/secrets"]


Expected results:
sh-4.4# cat audit* | grep <my_username> | grep secrets | jq -cs '.[] | [.requestURI]'
["/api/v1/secrets?limit=500"]
["/api/v1/secrets?continue=eyJ2IjoibWV0YS5rOHMuaW8vdjEiLCJydiI6OTE4OTM2NjAsInN0YXJ0IjoiZmVsaXgtdGVzdGluZzQxLXByb2plY3QtaW50ZXJuYWwtaW52YWxpZC1jbHVzdGVyLWluZm8vZGVmYXVsdC10b2tlbi1ra3dualx1MDAwMCJ9&limit=500"]
["/api/v1/secrets?continue=eyJ2IjoibWV0YS5rOHMuaW8vdjEiLCJydiI6OTE4OTM2NjAsInN0YXJ0Ijoib3BlbnNoaWZ0LWNsb3VkLWNyZWRlbnRpYWwtb3BlcmF0b3IvZGVmYXVsdC10b2tlbi1icnB0aFx1MDAwMCJ9&limit=500"]
["/api/v1/secrets?continue=eyJ2IjoibWV0YS5rOHMuaW8vdjEiLCJydiI6OTE4OTM2NjAsInN0YXJ0Ijoib3BlbnNoaWZ0LWt1YmUtYXBpc2VydmVyLW9wZXJhdG9yL2RlZmF1bHQtZG9ja2VyY2ZnLWxjbHdoXHUwMDAwIn0&limit=500"]
["/api/v1/secrets?continue=eyJ2IjoibWV0YS5rOHMuaW8vdjEiLCJydiI6OTE4OTM2NjAsInN0YXJ0Ijoib3BlbnNoaWZ0LW9hdXRoLWFwaXNlcnZlci9idWlsZGVyLXRva2VuLXZzcWg0XHUwMDAwIn0&limit=500"]
["/api/v1/secrets?continue=eyJ2IjoibWV0YS5rOHMuaW8vdjEiLCJydiI6OTE4OTM2NjAsInN0YXJ0Ijoib3M0LW1jbXAtbWlnLTM4L2J1aWxkZXItdG9rZW4ta2ZuMnZcdTAwMDAifQ&limit=500"]


Additional info:
1. https://docs.openshift.com/container-platform/4.5/security/audit-log-view.html