[Metrics SDK] Change Prometheus CMake target name

[lalitb]

Fixes #1764

Changed the target name to opentelemetry_exporter_prometheus .

$ ls /usr/local/lib/libopentelemetry_* -ltr
-rw-r--r-- 1 root root  5884858 Oct 28 08:10 /usr/local/lib/libopentelemetry_proto.a
-rw-r--r-- 1 root root   874006 Oct 28 16:19 /usr/local/lib/libopentelemetry_otlp_recordable.a
-rw-r--r-- 1 root root     3300 Nov 10 16:11 /usr/local/lib/libopentelemetry_version.a
-rw-r--r-- 1 root root   144904 Nov 10 16:11 /usr/local/lib/libopentelemetry_common.a
-rw-r--r-- 1 root root  2794826 Nov 10 16:11 /usr/local/lib/libopentelemetry_resources.a
-rw-r--r-- 1 root root  1910868 Nov 10 16:11 /usr/local/lib/libopentelemetry_http_client_curl.a
-rw-r--r-- 1 root root  5777388 Nov 10 16:11 /usr/local/lib/libopentelemetry_trace.a
-rw-r--r-- 1 root root 19873766 Nov 10 16:11 /usr/local/lib/libopentelemetry_metrics.a
-rw-r--r-- 1 root root  1559820 Nov 10 16:13 /usr/local/lib/libopentelemetry_exporter_ostream_metrics.a
-rw-r--r-- 1 root root  2175672 Nov 10 16:13 /usr/local/lib/libopentelemetry_exporter_prometheus.a
-rw-r--r-- 1 root root  2887576 Nov 10 16:13 /usr/local/lib/libopentelemetry_exporter_ostream_span.a
-rw-r--r-- 1 root root  2444300 Nov 10 16:13 /usr/local/lib/libopentelemetry_exporter_in_memory.a
-rw-r--r-- 1 root root   411284 Nov 10 16:24 /usr/local/lib/libopentelemetry_exporter_otlp_grpc_client.a
-rw-r--r-- 1 root root     2518 Nov 10 16:24 /usr/local/lib/libopentelemetry_exporter_otlp_grpc_log.a
-rw-r--r-- 1 root root  1780364 Nov 10 16:24 /usr/local/lib/libopentelemetry_exporter_otlp_http_client.a
-rw-r--r-- 1 root root   941658 Nov 10 16:24 /usr/local/lib/libopentelemetry_exporter_otlp_http_metric.a
-rw-r--r-- 1 root root  1017242 Nov 10 16:24 /usr/local/lib/libopentelemetry_exporter_otlp_http.a
-rw-r--r-- 1 root root  1021982 Nov 10 16:24 /usr/local/lib/libopentelemetry_exporter_otlp_grpc_metrics.a
-rw-r--r-- 1 root root  1093522 Nov 10 16:24 /usr/local/lib/libopentelemetry_exporter_otlp_grpc.a
-rw-r--r-- 1 root root  4246512 Nov 10 16:29 /usr/local/lib/libopentelemetry_exporter_zipkin_trace.a

[codecov]

Codecov Report

Merging #1765 (31cd053) into main (b157216) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1765   +/-   ##
=======================================
  Coverage   85.79%   85.79%           
=======================================
  Files         171      171           
  Lines        5212     5212           
=======================================
  Hits         4471     4471           
  Misses        741      741           

[marcalff]

LGTM, with format fix

[owent]

LGTM

[esigo]

LGTM
Thanks for the fix :)

[esigo]

I think we need to clean cache:

FATAL: corrupt installation: file '/Users/runner/.cache/bazel/install/055c20a5e[6](https://github.com/open-telemetry/opentelemetry-cpp/actions/runs/3441965197/jobs/5762053586#step:4:7)23d48b44a7c0f17b28c93a/A-server.jar' is missing or modified.  Please remove '/Users/runner/.cache/bazel/install/055c20a5e623d48b44a7c0f17b28c93a' and try again.
Error: Process completed with exit code 36.

can be done as explained here

[lalitb]

I think we need to clean cache:

FATAL: corrupt installation: file '/Users/runner/.cache/bazel/install/055c20a5e[6](https://github.com/open-telemetry/opentelemetry-cpp/actions/runs/3441965197/jobs/5762053586#step:4:7)23d48b44a7c0f17b28c93a/A-server.jar' is missing or modified.  Please remove '/Users/runner/.cache/bazel/install/055c20a5e623d48b44a7c0f17b28c93a' and try again.
Error: Process completed with exit code 36.

can be done as explained here

Thanks @esigo .