Support more filter push down in skipping strategy

[dai-chen]

Description

1. In each skipping strategy FlintSparkSkippingStrategy:
   a. Support more push down, especially support different expressions for MinMax
   b. Change Predicate to its parent Expression in trait to avoid type cast
2. In query rewrite rule ApplyFlintSparkSkippingIndex:
   a. Add verification to only apply rule to single or conjunction expression
   b. Add missing UT (use queryIndex() for easy mock)
3. Fix an assertion matcher bug in FlintSparkSkippingIndexITSuite

Issues Resolved

#2

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