There were a number of manual tag/releases created in our fork repo to
release changes that could be picked up in the vector fork. With
Jenkins, we now need to reset the version in the Cargo.toml files to
match the tag set so things don't get weird.

Ref: LOG-16869

Expose two simple methods - one for parsing VRL paths into segments and
one for joining segments into a VRL path. This accounts for for fields,
indexes and coalesce. The code will also handle quoting and minimizing
quoting on field to be more human friendly.

These two functions could be used to perform richer validation on user
input and simplify some of the more complex path construction in the
pipeline service and/or front end UI.

Ref: LOG-17092, LOG-16869