Update embedded SQLite3 to 3.45.2

[DL6ER]

What does this implement/fix?

CHANGELOG

1. Fix an error in UPSERT, introduced by enhancement 3a in version 3.35.0 (2021-03-12), that could cause an index to get out-of-sync with its table. Forum thread 919c6579c8.
2. Reduce the scope of the NOT NULL strength reduction optimization that was added as item 8e in version 3.35.0 (2021-03-12). The optimization was being attempted in some contexts where it did not work, resulting in incorrect query results. Forum thread 440f2a2f17.
3. Other trifling corrections and compiler warning fixes that have come up since the previous patch release. See the timeline for details.

---

Related issue or feature (if applicable): N/A

Pull request in docs with documentation (if applicable): N/A

---

By submitting this pull request, I confirm the following:

1. I have read and understood the contributors guide, as well as this entire template. I understand which branch to base my commits and Pull Requests against.
2. I have commented my proposed changes within the code.
3. I am willing to help maintain this change if there are issues with it later.
4. It is compatible with the EUPL 1.2 license
5. I have squashed any insignificant commits. (git rebase)

Checklist:

• [x] The code change is tested and works locally.
• [x] I based my code and PRs against the repositories developmental branch.
• [x] I signed off all commits. Pi-hole enforces the DCO for all contributions
• [x] I signed all my commits. Pi-hole requires signatures to verify authorship
• [x] I have read the above and my PR is ready for review.