Add `art_standalone_dex2oat_cts_tests` to ART Test Mapping and ART MTS.

* In ART Test Mapping, enable this test module in post-submit runs.
* In ART MTS, add this test module to shard 00 (along with other ART
* gtests).

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

  $ art/test/utils/regen-test-files
  Generated Blueprint files for 744 ART run-tests out of 1040 (71%).
  Generated TEST_MAPPING entries for 462 ART run-tests out of 1040 (44%):
    460 ART run-tests (99%) in `art-mainline-presubmit` test group.
    460 ART run-tests (99%) in `mainline-presubmit` test group.
    460 ART run-tests (99%) in `presubmit` test group.
      2 ART run-tests (0%) in `postsubmit` test group.
     24 ART gtests (96%) in `mainline-presubmit` test group.
     24 ART gtests (96%) in `presubmit` test group.
      1 ART gtests (4%) in `presubmit` test group.
    Note: Tests in `*presubmit` test groups are executed in pre- and
          post-submit test runs. Tests in the `postsubmit` test group
          are only executed in post-submit test runs.

Test: atest --test-mapping art:postsubmit
Test: m mts && mts-tradefed run commandAndExit mts-art
Test: m mts && mts-tradefed run commandAndExit mts-art-shard-03
Test: m mts \
        && mts-tradefed run commandAndExit mts-art \
             --module art_standalone_dex2oat_cts_tests
Bug: 167385698
Change-Id: I96029369a1383dec2f98412abae630b94f1edcb8