add Database.Sqlite.open' which takes a ByteString

[joeyh]

This allows using a sqlite database that is in a directory whose name cannot be expressed using Text.

Fixes #1481

Eventually it would make sense for open to use OsPath, but the Abstract FilePath Proposal is still rolling out. In the meantime, this avoids an API change for users of open.

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[parsonsmatt]

will release in another minor version