Add url.scheme to http.client.request.duration metric
#3525
| Job | Run time |
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| 11m 31s | |
| 11m 24s | |
| 9m 57s | |
| 12m 17s | |
| 6m 31s | |
| 11m 28s | |
| 6m 30s | |
| 10m 45s | |
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| 8m 29s | |
| 8m 4s | |
| 6m 56s | |
| 2h 14m 39s |