Create internal/arrow package for common code used in otelarrowexporter, otelarrowreceiver

[jmacd]

The purpose and use-cases of the new component

There is some shared code that lives in the otel-arrow repository that depends on unstable collector APIs. It will be a headache to continue maintaining these shared libraries because of it, and it would help to create internal/arrow for all the common code used in these two components.

Example configuration for the component

No config, just an internal group of packages. These include:

• netstats: counting network bytes compressed and uncompressed (generally useful)
• admission: limiting receiver in-flight data size (generally useful)
• compression: improved Zstd configuration support (generally useful)
• testdata, testutil: common test helpers (arrow-specific)

Telemetry data types supported

All

Is this a vendor-specific component?

• This is a vendor-specific component
• If this is a vendor-specific component, I am a member of the OpenTelemetry organization.
• If this is a vendor-specific component, I am proposing to contribute and support it as a representative of the vendor.

Code Owner(s)

jmacd, moh-osman3

Sponsor (optional)

No response

Additional context

No response

[github-actions]

Pinging code owners for exporter/otelarrow: @jmacd @moh-osman3 @codeboten. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

Pinging code owners for receiver/otelarrow: @jmacd @moh-osman3. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[crobert-1]

Sounds good!

Removing needs triage as it makes sense to me and was filed by a code owner.