[Feature]: PartialEq support for AnyValue

[psandana]

Related Problems?

The strtuct opentelemetry::logs::LogRecord has a member called attributes that is of type Option<Vec<(Key, AnyValue)>>.

Key is coming from opentelemetry::common::Key and it is already deriving from PartialEq and Eq. But AnyValue is not.

This makes comparisons not possible among two Option<Vec<(Key, AnyValue)>> or Vec<(Key, AnyValue)>. This is not ergonomic, as for simple unit testing of exporters/providers has to be done by hand-written iterations and custom comparisons.

This is valid for any scenario where an AnyValue is likely to be compared against another.

Describe the solution you'd like:

In here:
https://github.com/open-telemetry/opentelemetry-rust/blob/main/opentelemetry/src/logs/record.rs#L78

Change this:

/// Value types for representing arbitrary values in a log record.
#[derive(Debug, Clone)]
pub enum AnyValue {

By this:

/// Value types for representing arbitrary values in a log record.
#[derive(Debug, Clone, PartialEq)]
pub enum AnyValue {

Considered Alternatives

No response

Additional Context

AnyValue cannot derive from Eq, as f64 has not support for it.

[psandana]

Fixed by #1415