fix: Do not shadow exceptions on ext install (#2180)

Depending on where the exception occurred, the uninstall may fail,
because the extension is not installed in the first place, which hides
the actual error

server/src/main/kotlin/suwayomi/tachidesk/manga/impl/extension/Extension.kt

@@ -264,7 +264,10 @@ object Extension {
                 PackageTools.jarLoaderMap.remove(jarFilePath)?.close()
                 File(jarFilePath).delete()
 
+                try {
                     uninstallExtension(pkgName)
+                } catch (_: Throwable) {
+                }
                 throw e
             }
         } else {