spark: a file write drops its format options, so an encrypted Parquet table gets plaintext files and a CSV sep is ignored #1362

ToSubstraitRel.convertFileFormat keeps only five CSV keys and none for Parquet or ORC (ToSubstraitRel.scala:514-533), and ToLogicalPlan.convertFileFormat rebuilds Parquet and ORC writes with options = Map.empty (ToLogicalPlan.scala:490-491). Nothing rejects the options it cannot carry, so a file write that depends on one converts and runs, but produces different files.

Two consequences:

• Parquet encryption is silently dropped. With parquet.crypto.factory.class set to PropertiesDrivenCryptoFactory, a direct Spark write with parquet.encryption.column.keys / parquet.encryption.footer.key produces an encrypted file (magic PARE). The round-tripped InsertIntoHadoopFsRelationCommand with the same options writes a plaintext PAR1 file with the protected column readable in the bytes. Reads still succeed, since plaintext files are allowed, so nothing reports the problem.
• CSV sep and header are misread. The delimiter is read only from delimiter (line 522), but Spark also accepts sep, and header is compared case-sensitively against "false" (line 525). For CREATE TABLE c (id INT, s STRING) USING csv OPTIONS (sep '|'), the FileHolder carries fieldDelimiter=,, the replayed append writes 2,b, and the table then reads [null,null];[1,a].

spark.sql("CREATE TABLE csv_sep (id INT, s STRING) USING csv OPTIONS (sep '|')")
spark.sql("INSERT INTO csv_sep VALUES (1, 'a')")
// InsertIntoHadoopFsRelationCommand over csv_sep with options = table.storage.properties,
// query = SELECT 2 AS id, 'b' AS s -> ToSubstraitRel -> proto -> ToLogicalPlan -> execute
spark.sql("SELECT * FROM csv_sep ORDER BY id")  // [null,null];[1,a]

Suggested fix: reject options that FileOrFiles cannot carry (at minimum parquet.encryption.* and ORC's orc.encrypt / orc.mask), read sep before delimiter, and parse boolean options case-insensitively, as Spark does.

Measured on main at 72e902e (Spark 3.5.4 and 4.0.2). Pre-existing; #1269 left the options path unchanged.