Stabilize Version 10.0.90 (#36509)

<!-- Please let the below note in for people that find this PR -->
> [!NOTE]
> Are you waiting for the changes in this PR to be merged?
> It would be very helpful if you could [test the resulting
artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from
this PR and let us know in a comment if this change resolves your issue.
Thank you!

## Summary

Completes the SR9 servicing-version transition after the required
content backports.

- Preserves `PatchVersion` at `90`.
- Sets `PreReleaseVersionLabel` to `servicing`.
- Enables `StabilizePackageVersion` so SR9 produces stable release
packages.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: kubaflo

eng/Versions.props

@@ -5,14 +5,13 @@
     <MinorVersion>0</MinorVersion>
     <PatchVersion>90</PatchVersion>
     <SdkBandVersion>10.0.100</SdkBandVersion>
-    <PreReleaseVersionLabel>ci.main</PreReleaseVersionLabel>
-    <PreReleaseVersionLabel Condition="'$(BUILD_SOURCEBRANCH)' == 'refs/heads/inflight/current'">ci.inflight</PreReleaseVersionLabel>
+    <PreReleaseVersionLabel>servicing</PreReleaseVersionLabel>
     <PreReleaseVersionIteration>
     </PreReleaseVersionIteration>
     <!-- Servicing builds have different characteristics for the way dependencies, baselines, and versions are handled. -->
     <IsServicingBuild Condition=" '$(PreReleaseVersionLabel)' == 'servicing' ">true</IsServicingBuild>
     <!-- Enable to remove prerelease label and produce stable package versions. -->
-    <StabilizePackageVersion Condition="'$(StabilizePackageVersion)' == ''">false</StabilizePackageVersion>
+    <StabilizePackageVersion Condition="'$(StabilizePackageVersion)' == ''">true</StabilizePackageVersion>
     <DotNetFinalVersionKind Condition="'$(StabilizePackageVersion)' == 'true'">release</DotNetFinalVersionKind>
     <WorkloadVersionSuffix Condition="'$(DotNetFinalVersionKind)' != 'release' and '$(PreReleaseVersionIteration)' == ''">-$(PreReleaseVersionLabel)</WorkloadVersionSuffix>
     <WorkloadVersionSuffix Condition="'$(WorkloadVersionSuffix)' == '' and '$(DotNetFinalVersionKind)' != 'release'">-$(PreReleaseVersionLabel).$(PreReleaseVersionIteration)</WorkloadVersionSuffix>