fix --arch flag to fall back to emulation when native image unavailable, always infer hardware requirement for arch

sdk/base/lib/types/ManifestTypes.ts

@@ -132,7 +132,6 @@ export type SDKManifest = {
    *    `pattern` refers to a regular expression that at least one device of the specified class must match
    *    `patternDescription` is what will be displayed to the user about what kind of device is required
    * @property {number} ram - Minimum RAM requirement (in megabytes MB)
-   * @property {string[]} arch - List of supported arches
    * @example
    * ```
     hardwareRequirements: {
@@ -141,14 +140,12 @@ export type SDKManifest = {
         { class: 'processor', pattern: 'i[3579]-10[0-9]{3}U CPU', patternDescription: 'A 10th Generation Intel i-Series processor' },
       ],
       ram: 8192,
-      arch: ['x86-64'],
     },
    * ```
    */
   readonly hardwareRequirements?: {
     readonly device?: T.DeviceFilter[]
     readonly ram?: number | null
-    readonly arch?: string[] | null
   }
 
   /**

sdk/package/lib/manifest/setupManifest.ts

@@ -75,21 +75,18 @@ export function buildManifest<
     hardwareRequirements: {
       device: manifest.hardwareRequirements?.device || [],
       ram: manifest.hardwareRequirements?.ram || null,
-      arch:
-        manifest.hardwareRequirements?.arch === undefined
-          ? Object.values(images).reduce(
-              (arch, inputSpec) => {
-                if (inputSpec.emulateMissingAs) {
-                  return arch
-                }
-                if (arch === null) {
-                  return inputSpec.arch
-                }
-                return arch.filter((a) => inputSpec.arch.includes(a))
-              },
-              null as string[] | null,
-            )
-          : manifest.hardwareRequirements?.arch,
+      arch: Object.values(images).reduce(
+        (arch, inputSpec) => {
+          if (inputSpec.emulateMissingAs) {
+            return arch
+          }
+          if (arch === null) {
+            return inputSpec.arch
+          }
+          return arch.filter((a) => inputSpec.arch.includes(a))
+        },
+        null as string[] | null,
+      ),
     },
     hardwareAcceleration: manifest.hardwareAcceleration ?? false,
   }