Add TableRowMatchers with strict type-aware equality for BigQuery

[lalitx17]

Please add a meaningful description for your change here

What does this PR do?

Adds TableRowMatchers.isTableRowEqualTo(), a Hamcrest matcher that performs
strict type-aware equality for TableRow objects.

Usage

assertThat(actualRow, isTableRowEqualTo(expectedRow));

Changes

• Added TableRowMatchers.java with isTableRowEqualTo() matcher
• Added BigQueryTableRowEqualityTest.java with comprehensive tests

addresses #17997

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Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new utility for comparing BigQuery TableRow objects with strict type awareness. It addresses the need for a reliable way to assert equality between TableRow instances in tests, preventing subtle bugs that might arise from loose comparisons. The new Hamcrest matcher ensures that not only values but also their underlying types must match for two TableRow objects to be considered equal, providing a more robust testing mechanism for BigQuery data processing.

Highlights

• New Hamcrest Matcher: Added TableRowMatchers.isTableRowEqualTo(), a Hamcrest matcher designed for strict, type-aware equality comparison of BigQuery TableRow objects.
• Comprehensive Testing: Included BigQueryTableRowEqualityTest.java with extensive tests covering various scenarios, including identical rows, type mismatches, null values, different field counts, nested rows, and list fields, to ensure the matcher's robustness.

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[github-actions]

Checks are failing. Will not request review until checks are succeeding. If you'd like to override that behavior, comment assign set of reviewers

[lalitx17]

SocketTimeoutException so

[lalitx17]

retest this please

[lalitx17]

assign set of reviewers

[github-actions]

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