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GH-36882: [C++][Parquet] Use RLE as BOOLEAN default encoding when both data page and version is V2 (#38163)



### Rationale for this change

Only use RLE as BOOLEAN default encoding when data page is V2.

Previous patch ( https://github.com/apache/arrow/pull/36955 ) set RLE encoding for Boolean type by default.  However, parquet-cpp might write format v2 file with page v1 by default. This might cause parquet-cpp generating RLE encoding for boolean type by default. As https://issues.apache.org/jira/browse/PARQUET-2222 says, we still need some talks about that. So, we:

1. Still allow writing RLE on DataPage V2. This keeps same as parquet rust
2. If DataPage V1 is used, don't use RLE as default Boolean encoding.

### What changes are included in this PR?

Only use RLE as BOOLEAN default encoding when both data page and version is V2.

### Are these changes tested?

Yes

### Are there any user-facing changes?

RLE encoding change for Boolean.

* Closes: #36882

Lead-authored-by: mwish <maplewish117@gmail.com>
Co-authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: Antoine Pitrou <antoine@python.org>