test(bvt): add WEEK and YEARWEEK function test cases

[Ariznawlll]

Summary

• Add BVT test cases for WEEK(date, mode) function (93 cases) to verify fix for [Bug]: WEEK(date, mode) two-argument form rejected with 'bad value [DATE BIGINT]' #24236
• Add BVT test cases for YEARWEEK(date[, mode]) function (91 cases) to verify fix for [Bug]: YEARWEEK function not supported #24234
• Add BVT test cases for INTERVAL arithmetic expressions (58 cases) to verify fix for [Bug]: Parser error on arithmetic expression inside INTERVAL clause #24235
• Covers all modes 0-7, NULL handling, year boundaries, leap year, week 53, BIGINT mode, CAST, DATETIME/TIMESTAMP columns, WHERE/ORDER BY/GROUP BY/HAVING/JOIN/DISTINCT/INSERT SELECT/subquery usage
• Covers modulo/addition/multiplication/division in INTERVAL, NL2SQL week calculation patterns

Test plan

• func_datetime_week.test — 93 cases, 100% pass via mo-tester
• func_datetime_yearweek.test — 91 cases, 100% pass via mo-tester
• func_datetime_interval_arithmetic.test — 58 cases, 100% pass via mo-tester
• All results verified against MySQL for correctness

Related: #24236, #24234, #24235, #24293

🤖 Generated with Claude Code

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✅ Ariznawlll
❌ Ariznawl@163.com

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