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GH-35819: [GLib][Ruby] Refer dependency objects of GArrowExecutePlan (#35963)

### Rationale for this change

If we don't refer them, GC may free them unexpectedly.

Relations:

* `GArrowExecutePlan` -> `GArrowExecuteNode`s
* `GArrowExecuteNode` -> `GArrowExecuteOptions`
* `GArrowSourceNodeOptions` -> `GArrowRecordBatchReader` or `GArrowRecordBatch`
* `GArrowRecordBatchReader` -> `GArrowRecordBatch`s or `GArrowTable`

### What changes are included in this PR?

Add missing references in GLib and mark dependency container explicitly in Ruby.
Because we can't mark dependency container automatically in Ruby.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

Yes.
* Closes: #35819

Authored-by: Sutou Kouhei <kou@clear-code.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>