message: Organise cross-signing / secret storage rageshake details
  This changes to a common prefix for cross-signing and secret storage details so
  they appear all together in the alpha-sorted report.
diff: @@ -90,32 +90,31 @@ async function collectBugReport(opts: IOpts = {}, gzipLogs = true) {
  body.append('device_keys', keys.join(', '));
  body.append('cross_signing_key', client.getCrossSigningId());
  - body.append('device_keys', keys.join(', '));
  -
  // add cross-signing status information
  const crossSigning = client._crypto._crossSigningInfo;
  const secretStorage = client._crypto._secretStorage;
  + body.append("cross_signing_ready", String(await client.isCrossSigningReady()));
  + body.append("cross_signing_supported_by_hs",
  + String(await client.doesServerSupportUnstableFeature("org.matrix.e2e_cross_signing")));
  body.append("cross_signing_key", crossSigning.getId());
  - body.append("cross_signing_pk_in_ssss",
  + body.append("cross_signing_pk_in_secret_storage",
  String(!!(await crossSigning.isStoredInSecretStorage(secretStorage))));
  - body.append("ssss_key_in_account", String(!!(await secretStorage.hasKey())));
  const pkCache = client.getCrossSigningCacheCallbacks();
  - body.append("master_pk_cached",
  + body.append("cross_signing_master_pk_cached",
  String(!!(pkCache && await pkCache.getCrossSigningKeyCache("master"))));
  - body.append("self_signing_pk_cached",
  + body.append("cross_signing_self_signing_pk_cached",
  String(!!(pkCache && await pkCache.getCrossSigningKeyCache("self_signing"))));
  - body.append("user_signing_pk_cached",
  + body.append("cross_signing_user_signing_pk_cached",
  String(!!(pkCache && await pkCache.getCrossSigningKeyCache("user_signing"))));
  + body.append("secret_storage_ready", String(await client.isSecretStorageReady()));
  + body.append("secret_storage_key_in_account", String(!!(await secretStorage.hasKey())));
  +
  const sessionBackupKeyFromCache = await client._crypto.getSessionBackupPrivateKey();
  body.append("session_backup_key_cached", String(!!sessionBackupKeyFromCache));
  body.append("session_backup_key_well_formed", String(sessionBackupKeyFromCache instanceof Uint8Array));
  - body.append("cross_signing_supported_by_hs",
  - String(await client.doesServerSupportUnstableFeature("org.matrix.e2e_cross_signing")));
  - body.append("cross_signing_ready", String(await client.isCrossSigningReady()));
  - body.append("secret_storage_ready", String(await client.isSecretStorageReady()));
  }
  }
  