Only disable unlicensed pattern_text templating when mapper is used #135553
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Currently we always set the
index.mapping.pattern_text.disable_templatingsetting for every standard-mode index.This is a bit excessive, so this PR updates the logic to only include the setting if pattern_text field mappers are in use.
For now, as a first pass, we'll only check for pattern_text usage in the fields
messageanderror.message.This is an alternate approach to #135561