Fix the issue where the InstallLocation is missing after upgrading (#43462)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request
**Root Cause**

The issue occurs because the Installed property in MSI indicates whether
the current product code has been installed on the machine.
During a Major Upgrade (where the old and new versions have different
ProductCode values), the installation sequence is:
1. Burn schedules uninstall of the old MSI (the old version might not
have this custom action).
2. Then installs the new MSI.
> - At this point, the current product has not yet been installed, so
the Installed property is empty.
> - The condition NOT Installed evaluates to true, and
SetBundleInstallLocationData / SetBundleInstallLocation executes
normally, writing the InstallLocation registry key.

This means upgrading from an older version without this function to a
newer version with it works correctly.
However, issues appear in subsequent upgrades (from “newer” → “newer”)
because both versions include the same custom action.
The previous condition restricted the action to run only on first
install, preventing it from running during upgrades.

**Fix**

Added `OR WIX_UPGRADE_DETECTED` to the condition of
SetBundleInstallLocationData / SetBundleInstallLocation custom actions,
so they also execute during upgrade scenarios, ensuring the
InstallLocation registry value is correctly updated after version
upgrades.

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## PR Checklist

- [x] Closes: #43451
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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## Detailed Description of the Pull Request / Additional comments

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## Validation Steps Performed

installer/PowerToysSetupVNext/Product.wxs

@@ -120,8 +120,8 @@
 
       <Custom Action="SetUnApplyModulesRegistryChangeSetsParam" Before="UnApplyModulesRegistryChangeSets" />
       <Custom Action="CheckGPO" After="InstallInitialize" Condition="NOT Installed" />
-      <Custom Action="SetBundleInstallLocationData" Before="SetBundleInstallLocation" Condition="NOT Installed" />
-      <Custom Action="SetBundleInstallLocation" After="InstallFiles" Condition="NOT Installed" />
+      <Custom Action="SetBundleInstallLocationData" Before="SetBundleInstallLocation" Condition="NOT Installed OR WIX_UPGRADE_DETECTED" />
+      <Custom Action="SetBundleInstallLocation" After="InstallFiles" Condition="NOT Installed OR WIX_UPGRADE_DETECTED" />
       <Custom Action="ApplyModulesRegistryChangeSets" After="InstallFiles" Condition="NOT Installed" />
       <Custom Action="InstallCmdPalPackage" After="InstallFiles" Condition="NOT Installed" />
       <Custom Action="InstallPackageIdentityMSIX" After="InstallFiles" Condition="NOT Installed" />