chore: when depend on `tonic`, use it with `default-features = false`h

[dzmitry-lahoda]

here:

opentelemetry-rust/opentelemetry-otlp/Cargo.toml

Line 53 in 4830a3c

tonic = { workspace = true, features = ["server"] }

because tonic defaults to routing feature depends on axum (full blown web framework).
which breaks my build.

in general ore libs should make all deps default-features = false by default

[cijothomas]

in general ore libs should make all deps default-features = false by default

Agree 💯 Would you have some bandwidth to make this change?

[dzmitry-lahoda]

likely solved by #2710