Regenerate ART test files.

Disable new run-test `821-many-args` as it is currently failing when
run with the `ArtRunTest` TradeFed test runner.

Output of `art/test/utils/regen-test-files -m`:

  $ art/test/utils/regen-test-files
  Generated Blueprint files for 622 ART run-tests out of 924 (67%).
  Generated TEST_MAPPING entries for 376 ART run-tests out of 924 (40%):
    94 tests (25%) in `mainline-presubmit` test group.
    376 tests (100%) in `presubmit` test group.
    0 tests (0%) in `postsubmit` test group.

Test: atest --test-mapping art:presubmit
Change-Id: I03d13ca5ce1c26b31bf2c47a34f5c3826702728b
3 files changed