Follow-up to #137534.

We should increase test coverage a little bit more in AllSupportedFieldsTestCase. Recall, these tests guard against regressions of existing, simple queries when we roll out new data types, and thus prevent accidental breakage.

• More test cases:
  • Enable ENRICH tests in AllSupportedFieldsTestCase on SNAPSHOT: requires updating the test cases for the new DATE_RANGE type. See disabled test cases here and here.
  • Bwc tests with union types, when one (or more) of the constituent types are only supported on the newer nodes
  • tests with subfields: a.b may have a supported type but a not and vice versa
  • Tests with CPS/remote indices aliased by a flat index name
  • CCQ tests where one cluster can already index EXPONENTIAL_HISTOGRAM (and any other new types that we'll add in the future) but another cluster is too old - the corresponding fields should be treated as UNSUPPORTED irrespective of whether the new or the old cluster is coordinating the query.
  • Tests with _tsid