eBPF config provider

[RonFed]

• Add an extension to the existing OtelEbpfSdk which allows to send configuration to a running SDK - the extended interface is called ConfigurableOtelEbpfSdk.
• Implement a basic config provider which is generic but currently only used by the Go instrumentation.
• Update the dependency of go.opentelemetry.io/auto
• Add Languages method to InstrumentationConfig which returns the relevant languages specified in the CRD - this allows filtering the call to the relevant eBPF directors.

[edeNFed]

Shouldn't we pass context.Context here as well? And maybe cancel it when we want to stop watching?

[RonFed]

I'm not sure since it is ment to be a getter for the channel.
The calling code in the instrumentation looks like:

	for {
		select {
		case <-ctx.Done():
			return
		case c, ok := <-m.cp.Watch():
			if !ok {
				m.logger.Info("Configuration provider closed, configuration updates will no longer be received")
				return
			}
			err := m.applyConfig(c)
			if err != nil {
				m.logger.Error(err, "Failed to apply config")
				continue
			}
			m.currentConfig = c
		}
	}

The way to stop watching should be to call Shutdown - which is called by the instrumentation once it is closing

[edeNFed]

We assume the caller passed ctx which has a timeout, maybe a better design would be to get both context and time.Time or something as arguments and wrap the context in this function instead of assuming the caller did it

[RonFed]

added timeout of 50ms for sending configuration