Improving caching on CircleCI

[cecton]

We should change those (in the 3 platform):

            - rust/build:
                # This is prefixed in the orb with 'cargo-'
                cache_version: v2-macos
                crate: --workspace --tests

To do:

• cargo build --workspace --tests --no-default-features --features otlp-tonic
• cargo build --workspace --tests --no-default-features --features otlp-tonic,tls
• cargo build --workspace --tests --no-default-features --features otlp-grpcio (not on windows)
• cargo build --workspace --tests --no-default-features --features otlp-http

[abernix]

@o0Ignition0o I'm curious if you feel like you've perhaps addressed some of this with #151?

[o0Ignition0o]

Tests are now done through xtask and the cache granularity has gotten better, so I'd say we've addressed it

[cecton]

Great! Thanks a lot