fix(test): add missing clearInstallInfo() in executeUpgrade afterEach

Both executeUpgrade describe blocks (curl and nightly) call
setInstallInfo() in beforeEach but were missing the matching
clearInstallInfo() in afterEach, leaking DB state to subsequent tests.

Author: BYK

test/lib/upgrade.test.ts

@@ -1001,6 +1001,7 @@ describe("executeUpgrade with curl method", () => {
         // Ignore
       }
     }
+    clearInstallInfo();
   });
 
   test("downloads and decompresses gzip binary when .gz URL succeeds", async () => {
@@ -1272,6 +1273,7 @@ describe("executeUpgrade with curl method (nightly)", () => {
         // Ignore
       }
     }
+    clearInstallInfo();
   });
 
   test("downloads and decompresses nightly binary from GHCR", async () => {