FS1118 on inlined function in private module from SDK 8.0.300 #17161

[KevinRansom]

Fixes: #17161

• Add test cases
• Fix it

This is a regression it should go into 8.0.300
/cc @vzarytovskii , @baronfel

[github-actions]

⚠️ Release notes required, but author opted out

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cc @dotnet/fsharp-team-msft

[emz00]

Thanks for the quick fix! Does this also fix the warning for class members?

[vzarytovskii]

/backport to release/dev17.10

[github-actions]

Started backporting to release/dev17.10: https://github.com/dotnet/fsharp/actions/runs/9130940180

[github-actions]

@vzarytovskii backporting to release/dev17.10 failed, the patch most likely resulted in conflicts:

$ git am --3way --ignore-whitespace --keep-non-patch changes.patch

Applying: temp
Using index info to reconstruct a base tree...
M	src/Compiler/Optimize/Optimizer.fs
M	tests/AheadOfTime/Trimming/check.ps1
Falling back to patching base and 3-way merge...
Auto-merging tests/AheadOfTime/Trimming/check.ps1
CONFLICT (content): Merge conflict in tests/AheadOfTime/Trimming/check.ps1
Auto-merging src/Compiler/Optimize/Optimizer.fs
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config advice.mergeConflict false"
Patch failed at 0001 temp
Error: The process '/usr/bin/git' failed with exit code 128

Please backport manually!

[KevinRansom]

@loop-evgeny, Sorry not to get back to you, it was 1:00 am last night when I propped this PR. I believe this will take care of the class issues too, I will add test cases for it and also verify #17161.