Runner: fix sln structure (#41841)

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## Summary of the Pull Request
Common project was put into dsc folder by mistake, move it back to root
folder of powertoys

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## PR Checklist
Visual studio build successfully

- [ ] Closes: #xxx
- [ ] **Communication:** I've discussed this with core contributors
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- [ ] **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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PowerToys.sln

@@ -2932,7 +2932,6 @@ Global
 		{D1D6BC88-09AE-4FB4-AD24-5DED46A791DD} = {4574FDD0-F61D-4376-98BF-E5A1262C11EC}
 		{F9C68EDF-AC74-4B77-9AF1-005D9C9F6A99} = {D1D6BC88-09AE-4FB4-AD24-5DED46A791DD}
 		{9C6A7905-72D4-4BF5-B256-ABFDAEF68AE9} = {264B412F-DB8B-4CF8-A74B-96998B183045}
-		{1AFB6476-670D-4E80-A464-657E01DFF482} = {557C4636-D7E1-4838-A504-7D19B725EE95}
 		{1A066C63-64B3-45F8-92FE-664E1CCE8077} = {1AFB6476-670D-4E80-A464-657E01DFF482}
 		{5CCC8468-DEC8-4D36-99D4-5C891BEBD481} = {D1D6BC88-09AE-4FB4-AD24-5DED46A791DD}
 		{89E20BCE-EB9C-46C8-8B50-E01A82E6FDC3} = {4574FDD0-F61D-4376-98BF-E5A1262C11EC}