Diskbuffering configuration package

[LikeTheSalad]

Description:

Creates a public configuration config package to place all the configuration-related files, including the TemporaryFileProvider type that was placed in an internal package by mistake.

Existing Issue(s):

#1772

[breedx-splk]

Thanks. It's a good change....although I would have preferred io.opentelemetry.contrib.disk.buffering.config to io.opentelemetry.contrib.disk.buffering.configuration for brevity, but not a huge issue.

[LikeTheSalad]

Thanks. It's a good change....although I would have preferred io.opentelemetry.contrib.disk.buffering.config to io.opentelemetry.contrib.disk.buffering.configuration for brevity, but not a huge issue.

Sounds good. I've made the change.