[Python] Remove remaining deprecated APIs from <= 1.0.0

[asfimport]

Not all deprecations from <=1.0.0 were already done in ARROW-17010, the remaining ones:

• Ignoring mismatch between ordered flag of values and type in array(..)
• RecordBatchReader get_next_batch method
• DictionaryScalar.index/dictionary_value attributes (deprecated since 1.0.0)
• num_children field of DataType
• add_metadata method of Field

Reporter: Joris Van den Bossche / @jorisvandenbossche
Assignee: Alenka Frim / @AlenkaF

PRs and other links:

• GitHub Pull Request #14401

_{Note: This issue was originally created as ARROW-17649. Please see the migration documentation for further details.}

[asfimport]

Joris Van den Bossche / @jorisvandenbossche:
Issue resolved by pull request 14401
#14401