Update OTelCol exporter names used by metrics/trace SDKs

[jmacd]

Description: This modifies the telemetry output by the SDKs regarding their export pipelines.

Link to tracking Issue:
Relates to f5/otel-arrow-adapter#119

Testing: n/a

[codecov-commenter]

Codecov Report

Patch coverage: 66.66% and no project coverage change.

Comparison is base (6ed7e08) 89.13% compared to head (bb0912b) 89.13%.

❗ Current head bb0912b differs from pull request most recent head f255ed7. Consider uploading reports for the commit f255ed7 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #480   +/-   ##
=======================================
  Coverage   89.13%   89.13%           
=======================================
  Files          61       61           
  Lines        3581     3581           
=======================================
  Hits         3192     3192           
  Misses        302      302           
  Partials       87       87           

Impacted Files	Coverage Δ
...htstep/sdk/metric/exporters/otlp/otelcol/client.go	74.52% <66.66%> (ø)
...ghtstep/sdk/trace/exporters/otlp/otelcol/client.go	68.36% <66.66%> (ø)

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