setFCV flag causes a thread leak

Affected version 1.10.0 and main branch.

If I take default cr.yaml and set setFCV flag to true:

   upgradeOptions:
    versionServiceEndpoint: https://check.percona.com
    apply: 4.4-recommended
    schedule: "0 2 * * *"
    setFCV: true

I see the thread leak in a mongod container of the replicaset pods.

As a result pods might get into a crash loop eventually.

Steps to reproduce:

1) I can reproduce on both GKE and minikube

2) Deploy default bundle.yaml

3) Change setFCV to true in default cr.yaml

4) Deploy cr.yaml

P.S. It does not matter if sharding is used or not.

How to see the issue

**Exec into mongod container of a replicaset pod:

$ kubectl exec -ti my-cluster-name-rs0-0 bash -c mongod
bash-4.4$ while true; do ps -eLf | wc -l && sleep 5 ; done
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Expectation

No thread leak