Server-Side Diff and webhook CA verification error

[llavaud]

Describe the bug

With Server-Side Diff activated, sometimes sync operations error as it fails to verify a webhook certificate authority

To Reproduce

Create an application that deploy resources on a cluster with Validatingwebhookconfigurations, wait for the error to appears

Expected behavior

Diff without errors

Screenshots

Version

argocd: v2.10.1+a79e0ea
  BuildDate: 2024-02-14T17:37:43Z
  GitCommit: a79e0eaca415461dc36615470cecc25d6d38cefb
  GitTreeState: clean
  GoVersion: go1.21.3
  Compiler: gc
  Platform: linux/amd64

Logs

Failed to compare desired state to live state: failed to calculate diff: error calculating server side diff: serverSideDiff error: error running server side apply in dryrun mode for resource Pooler/pooler-barcnpg-tloubiou-test-rw: Internal error occurred: failed calling webhook "vpooler.cnpg.io": failed to call webhook: Post "https://cnpg-webhook-service.cnpg-operator.svc:443/validate-postgresql-cnpg-io-v1-pooler?timeout=10s": tls: failed to verify certificate: x509: certificate signed by unknown authority