Add tests for format_datetime() with time zone offsets #8095

Job	Run time
Build	50m 54s
Spark Aggregate Fuzzer	16m 0s
Presto Fuzzer	15m 56s
Presto Bias Fuzzer	0s
Aggregation Fuzzer with Presto as source of truth	17m 59s
Exchange Fuzzer	16m 26s
RowNumber Fuzzer	15m 48s
Join Fuzzer	15m 45s
Spark Bias Fuzzer	0s
Spark Fuzzer	15m 52s
Signature Changes	2s
Biased Aggregation Fuzzer with Presto as source of truth	0s
Window Fuzzer with Presto as source of truth	17m 42s
Writer Fuzzer with Presto as source of truth	17m 45s
	3h 20m 9s

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