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b1b7bf3912
Backport of #59293 to 7.x branch. * Create new data-stream xpack module. * Move TimestampFieldMapper to the new module, this results in storing a composable index template with data stream definition only to work with default distribution. This way data streams can only be used with default distribution, since a data stream can currently only be created if a matching composable index template exists with a data stream definition. * Renamed `_timestamp` meta field mapper to `_data_stream_timestamp` meta field mapper. * Add logic to put composable index template api to fail if `_data_stream_timestamp` meta field mapper isn't registered. So that a more understandable error is returned when attempting to store a template with data stream definition via the oss distribution. In a follow up the data stream transport and rest actions can be moved to the xpack data-stream module.
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