On enabling/disabeling only reload-lists instead of reload

[yubiuser]

• I have read and understood the contributors guide, as well as this entire template.
• I have made only one major change in my proposed changes.
• I have commented my proposed changes within the code.
• I have tested my proposed changes, and have included unit tests where possible.
• I am willing to help maintain this change if there are issues with it later.
• I give this submission freely and claim no ownership.
• It is compatible with the EUPL 1.2 license
• I have squashed any insignificant commits. (git rebase)

Please make sure you Sign Off all commits. Pi-hole enforces the DCO.

---

What does this PR aim to accomplish?:
When blocking is enabled/disabled pihole restartdns reload was executed. Changing to pihole restartdns reload-lists should be sufficient and minimize restart time as well as preserve DNS cache.

Inspired by https://discourse.pi-hole.net/t/why-are-dhcp-leases-reconfirmed-when-disabling-and-enabling-blocking/48720

[DL6ER]

Note that this does only work with the latest FTL beta (pi-hole/FTL@d0ecd74)

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/why-are-dhcp-leases-reconfirmed-when-disabling-and-enabling-blocking/48720/10

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/pi-hole-ftl-v5-9-web-v5-6-and-core-v5-4-released/49544/1