feat: support meta protocol instrumentation

[nickamorim]

Description

Dalli supports Memcached's meta protocol as of 3.2.0. This PR adds support for instrumentation when clients are using the meta protocol.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: nickamorim (b12e3f8, 4fe2450)
• ✅ login: robertlaurin / name: Robert (2979a54)

[kaylareopelle]

Hi @nickamorim! Thanks for your contribution!

There's a comment in the server patch that should be updated too:

opentelemetry-ruby-contrib/instrumentation/dalli/lib/opentelemetry/instrumentation/dalli/patches/server.rb

Line 11 in f631a26

# Module to prepend to Dalli::Server (or Dalli::Protocol::Binary in 3.0+) for instrumentation

I wonder if we should rename the patch now that it applies to so many different classes?

[kaylareopelle]

The tests currently run on the default protocol.

opentelemetry-ruby-contrib/instrumentation/dalli/test/opentelemetry/instrumentation/dalli/instrumentation_test.rb

Line 18 in 06c8de0

let(:dalli) { Dalli::Client.new("#{host}:#{port}", {}) }

In the latest version, this should default to binary. Now that the protocol could be :binary or :meta, what do you think about updating the tests to run on a :meta protocol?

[nickamorim]

I wonder if we should rename the patch now that it applies to so many different classes?

I'm not exactly sure what this would look like but it seems that Dalli::Server is deprecated in favour of specifying the protocol https://github.com/petergoldstein/dalli/blob/main/lib/dalli/server.rb#L4.

As an aside, did you want me to update the version too as part of this PR? Nvm, I read https://github.com/open-telemetry/opentelemetry-ruby-contrib/blob/main/CONTRIBUTING.md#releases