Don't set index.dimensions if dimensions are added via dynamic templates#135212
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...ata-streams/src/main/java/org/elasticsearch/datastreams/DataStreamIndexSettingsProvider.java
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Disables the
index.dimensionstsid creation optimization If dynamic templates are used to define dimensions.There are edge cases that would lead us to include more fields into the tsid than we should (see code comments and tests).
While there may be ways we could try to only fall back in these problematic cases, it seems better to just always fall back in dynamic templates that define dimensions are involved. Otherwise, it'll be very hard to explain and debug this. For OTel metrics, we're not using dynamic templates to define dimensions, only passthrough fields.
Addresses #132566 (comment)