Release Preparation: Update metric SDK use in otelgocql

[MrAlias]

Temporarily remove the metric SDK in otelgocql/test use while the metrictest package is being developed.

Update the example package in otelgocql to use the new metric SDK.

Part of open-telemetry/opentelemetry-go#3176

[codecov]

Codecov Report

Merging #2760 (1a63aa4) into main (c4876c3) will increase coverage by 2.9%.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #2760     +/-   ##
=======================================
+ Coverage   74.4%   77.4%   +2.9%     
=======================================
  Files        145     147      +2     
  Lines       6707    6753     +46     
=======================================
+ Hits        4993    5229    +236     
+ Misses      1566    1363    -203     
- Partials     148     161     +13     

Impacted Files	Coverage Δ
.../github.com/gocql/gocql/otelgocql/internal/cass.go	95.1% <0.0%> (ø)
...n/github.com/gocql/gocql/otelgocql/test/version.go	0.0% <0.0%> (ø)
...ntation/github.com/gocql/gocql/otelgocql/config.go	57.1% <0.0%> (+57.1%)	⬆️
...ion/github.com/gocql/gocql/otelgocql/instrument.go	62.5% <0.0%> (+62.5%)	⬆️
...ation/github.com/gocql/gocql/otelgocql/observer.go	75.1% <0.0%> (+75.1%)	⬆️
...entation/github.com/gocql/gocql/otelgocql/gocql.go	100.0% <0.0%> (+100.0%)	⬆️
...tation/github.com/gocql/gocql/otelgocql/version.go	100.0% <0.0%> (+100.0%)	⬆️