Use recordResponseTimeMetric instead recordMetric in NewRelic agent API layer

[jtduffy]

Test run PR of #2128 from @Matzz

com.newrelic.api.agent.NewRelic::recordResponseTimeMetric is calling the wrong method on the metricAggregator instance:

    public static void recordResponseTimeMetric(String name, long millis) {
        getAgent().getMetricAggregator().recordMetric(name, millis);
    }

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.71%. Comparing base (d1111df) to head (4674860).
Report is 9 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2132      +/-   ##
============================================
+ Coverage     70.69%   70.71%   +0.01%     
- Complexity     9983     9985       +2     
============================================
  Files           841      841              
  Lines         40289    40290       +1     
  Branches       6107     6107              
============================================
+ Hits          28484    28492       +8     
+ Misses         9062     9053       -9     
- Partials       2743     2745       +2     

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