Roll out 1.45.0 to 100% (#9148)

* Roll out 1.45.0 to 50%

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 5ac12042-9631-4792-b18f-f90eecf350d5

* Roll out 1.45.0 to 100%

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 5ac12042-9631-4792-b18f-f90eecf350d5

* Keep cleanInstall true for 1.45.0 full rollout

Match the documented rule (Update-Infrastructure.md) and prior 100%
rollouts (#9026, #8991), which all keep cleanInstall true. Only the
default rollout percentage advances to 100%.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 790aac27-b53e-404e-bd5f-1c24fdb5ce4f

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: charan-kamasani <156611911+charan-kamasani@users.noreply.github.com>
Copilot-Session: 5ac12042-9631-4792-b18f-f90eecf350d5
Copilot-Session: 790aac27-b53e-404e-bd5f-1c24fdb5ce4f

Author: 4 people

version/version.json

@@ -43,7 +43,7 @@
       "updateGroups": [
         {
           "name": "default",
-          "percentage": 50
+          "percentage": 100
         }
       ],
       "cleanInstall": true,