[SPARK-35697][SQL][TESTS] Test TimestampWithoutTZType as ordered and atomic type

[gengliangwang]

What changes were proposed in this pull request?

Add TimestampWithoutTZType to DataTypeTestUtils.ordered/atomicTypes, and implement values generation of those types in LiteralGenerator/RandomDataGenerator. In this way, the types will be tested automatically in:

1. ArithmeticExpressionSuite:
   • "function least"
   • "function greatest"
2. PredicateSuite
   • "BinaryComparison consistency check"
   • "AND, OR, EqualTo, EqualNullSafe consistency check"
3. ConditionalExpressionSuite
   • "if"
4. RandomDataGeneratorSuite
   • "Basic types"
5. CastSuite
   • "null cast"
   • "up-cast"
   • "SPARK-27671: cast from nested null type in struct"
6. OrderingSuite
   • "GenerateOrdering with TimestampWithoutTZType"
7. PredicateSuite
   • "IN with different types"
8. UnsafeRowSuite
   • "calling get(ordinal, datatype) on null columns"
9. SortSuite
   • "sorting on TimestampWithoutTZType ..."

Why are the changes needed?

To improve test coverage.

Does this PR introduce any user-facing change?

No

How was this patch tested?

By running the affected test suites.

[gengliangwang]

This one is to follow #31782

[SparkQA]

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[SparkQA]

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[cloud-fan]

thanks, merging to master!

[SparkQA]

Test build #139574 has finished for PR 32843 at commit 6a4fc48.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.