Allow word_delimiter_graph_filter to not adjust internal offsets

[romseygeek]

This commit adds an adjust_offsets parameter to the word_delimiter_graph token filter, defaulting
to true. Most of the time you'd want sub-tokens emitted by this filter to have offsets that are
adjusted to their real position in the token stream; however, some token filters can change the length
or starting position of a token (eg trim) without changing their offset attributes, and this can lead to
word_delimiter_graph emitting illegal offsets. Setting adjust_offsets to false in these cases will
allow indexing again.

Fixes #34741, #33710

[elasticmachine]

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