opentelemetry: Remove chatty log in client (#8606)

Removing this debug log to reduce noise. This log fires on every RPC
call but provides no useful debugging value. The action it logs (adding
callInfo to the context) is part of the normal flow, and the message
contains no helpful variables.

RELEASE NOTES: N/A

Author: arjan-bal

stats/opentelemetry/client_metrics.go

@@ -72,9 +72,6 @@ func (h *clientMetricsHandler) initializeMetrics() {
 func getOrCreateCallInfo(ctx context.Context, cc *grpc.ClientConn, method string, opts ...grpc.CallOption) (context.Context, *callInfo) {
 	ci := getCallInfo(ctx)
 	if ci == nil {
-		if logger.V(2) {
-			logger.Info("Creating new CallInfo since its not present in context")
-		}
 		ci = &callInfo{
 			target: cc.CanonicalTarget(),
 			method: determineMethod(method, opts...),