fix: return empty iterator instead of null in tagValues #19894
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wolffcm
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ethanyzhang
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ethanyzhang
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Nov 4, 2020
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Fixes influxdata/flux#3300.
We were returning
nilinstead of an empty iterator, and callers expect a non-nil result set for any non-error return.I added a regression test for this here: influxdata/flux#3303.