Commit4692747

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feat: add WRITE_TRUNCATE_DATA enum (#2166)

This PR documents the new WRITE_TRUNCATE_DATA write disposition by adding the enum value.internal issue: b/406848221

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Original file line number	Diff line number	Diff line change
`@@ -338,6 +338,10 @@ class WriteDisposition(object):`
`338`	`338`	`WRITE_TRUNCATE="WRITE_TRUNCATE"`
`339`	`339`	`"""If the table already exists, BigQuery overwrites the table data."""`
`340`	`340`
	`341`	`+WRITE_TRUNCATE_DATA="WRITE_TRUNCATE_DATA"`
	`342`	`+"""For existing tables, truncate data but preserve existing schema`
	`343`	`+ and constraints."""`
	`344`	`+`
`341`	`345`	`WRITE_EMPTY="WRITE_EMPTY"`
`342`	`346`	`"""If the table already exists and contains data, a 'duplicate' error is`
`343`	`347`	`returned in the job result."""`

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