Remove scanner and camera buttons for .net 8

[nabalone]

This change is 

[nabalone]

I have tested this in .net 8 BloomDesktop but not in any .net 4 application

[github-actions]

Palaso Tests

     4 files  ±0       4 suites  ±0   10m 36s ⏱️ +32s
 5 058 tests ±0   4 825 ✅ ±0  233 💤 ±0  0 ❌ ±0 
16 477 runs  ±0  15 757 ✅ ±0  720 💤 ±0  0 ❌ ±0 

Results for commit 5502d14. ± Comparison against base commit 92ea189.

♻️ This comment has been updated with latest results.

[andrew-polk]

Looks good. Let's add to the changelog.

[nabalone]

Done

Reviewable status: 0 of 2 files reviewed, all discussions resolved

[andrew-polk]

@andrew-polk reviewed 2 of 2 files at r2, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @nabalone)

---

CHANGELOG.md line 34 at r1 (raw file):

### Removed

- [SIL.Windows.Forms] In .NET 8 builds, removed Scanner and Camera options from the Image Toolbox.

Now that we released 16.2, this needs to go under the [Unreleased] header above.
You'll need to add a new ### Removed

[andrew-polk]

@andrew-polk reviewed 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @nabalone)