[SPARK-43380][SQL][FOLLOWUP] Deprecate toSqlType(avroSchema: Schema, …useStableIdForUnionType: Boolean): SchemaType

[beliefer]

What changes were proposed in this pull request?

#43530 provides a new method:

  /**
   * Converts an Avro schema to a corresponding Spark SQL schema.
   *
   * @since 4.0.0
   */
  def toSqlType(avroSchema: Schema, useStableIdForUnionType: Boolean): SchemaType = {
    toSqlTypeHelper(avroSchema, Set.empty, useStableIdForUnionType)
  }

Because take AvroOptions as parameter causes the performance regression, the old toSqlType looks very useless.

This PR also improve some caller of toSqlType by pass useStableIdForUnionType directly.

Why are the changes needed?

Deprecate toSqlType(avroSchema: Schema, …useStableIdForUnionType: Boolean): SchemaType

Does this PR introduce any user-facing change?

'No'.

How was this patch tested?

Exists test cases.

Was this patch authored or co-authored using generative AI tooling?

'No'.

[beliefer]

ping @cloud-fan cc @zeruibao

[zeruibao]

LGTM!

[beliefer]

Merged to master. @cloud-fan @zeruibao Thank you!