Add Array.IndexOf translation for byte arrays in SQL Server and SQLite

[Quattordici]

Fixes #19287

Summary

This PR adds support for translating Array.IndexOf() calls on byte arrays to SQL for SQL Server and SQLite databases.

Changes

Source Code Changes

• SqlServerByteArrayMethodTranslator: Added translation for Array.IndexOf() using the CHARINDEX function. The translation accounts for the difference in indexing (CHARINDEX is 1-based and returns 0 when not found, while Array.IndexOf is 0-based and returns -1).

• SqliteByteArrayMethodTranslator: Added translation for Array.IndexOf() using the instr() function. Similar to SQL Server, the translation adjusts for the 1-based indexing of instr().

• Refactoring: Extracted common byte conversion logic into helper methods (ToSingleByteArray in SQL Server translator and ToSingleByteBlob in SQLite translator) to avoid duplication between Contains and IndexOf translations.

Test Coverage

• ByteArrayTranslationsTestBase: Added 5 new test cases covering:

  • IndexOf_with_constant() - searching for a constant byte value
  • IndexOf_with_parameter() - searching for a parameter byte value
  • IndexOf_with_column() - searching for a column byte value
  • IndexOf_with_parameter_above_ascii_range() - handling non-ASCII byte values
  • IndexOf_not_found() - verifying -1 is returned when value is not found

• SqlServerByteArrayMethodTranslator tests: Added corresponding SQL verification tests for SQL Server translation output.

• SqliteByteArrayMethodTranslator tests: Added corresponding SQL verification tests for SQLite translation output.

• CosmosDB tests: Added expected translation failure tests (Cosmos doesn't support this translation).

Technical Details

The implementation properly handles:

• Constant byte values (optimized to direct hex literals)
• Parameter byte values (converted to varbinary/BLOB)
• Column references (converted to varbinary/BLOB)
• Byte values above ASCII range (0x7F+)
• Correct return value semantics (-1 for not found, 0-based indexing)

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