Create test pattern for Spans

Part of https://github.com/apache/datafusion-sqlparser-rs/issues/1548

# Usecase

- We have added span information in https://github.com/apache/datafusion-sqlparser-rs/pull/1435

We would like to add span information through out the rest of the AST structures (see docs in https://github.com/apache/datafusion-sqlparser-rs/pull/1549) and list on https://github.com/apache/datafusion-sqlparser-rs/issues/1548

In order to support this feature reasonably, we need to be able to test the feature and avoid regressions

# Proposal

I think we need some sort of span test.

I recommend
1. A new test binary like `tests/sqlparser_spans.rs`

Then add a test that
1. Parses a SQL string
2. Check the spans of the AST nodes match what is expected

I think we'll have to use judgement on how fine grained the location information
can / should be.

阅读 issues 1548 和 1563 以及 PRs 1435 和 1549 中的上下文，以了解现有的 span 信息和计划中的 AST 覆盖范围。从提议的测试入口 tests/sqlparser_spans.rs 开始：解析具有代表性的 SQL 字符串，并将 AST 节点的 span 与预期位置进行比较。当 span 行为已由测试覆盖且能够检测回归时，即视为完成。

由索引模型根据 Issue 内容生成。