Testing changes from collector-core#12825

[ArthurSens]

This PR's intention is only to test changes made by open-telemetry/opentelemetry-collector#12825

I've added a test that only passes if I add the replace directives, which proves it works :)
Without them, the test fails with:

--- FAIL: TestSnappyCompression (0.01s)
    --- FAIL: TestSnappyCompression/request_0 (0.00s)
        /Users/arthursens/Documents/projetos/opentelemetry-collector-contrib/receiver/prometheusremotewritereceiver/receiver_test.go:477: 
            	Error Trace:	/Users/arthursens/Documents/projetos/opentelemetry-collector-contrib/receiver/prometheusremotewritereceiver/receiver_test.go:477
            	Error:      	Not equal: 
            	            	expected: 204
            	            	actual  : 400
            	Test:       	TestSnappyCompression/request_0
        /Users/arthursens/Documents/projetos/opentelemetry-collector-contrib/receiver/prometheusremotewritereceiver/receiver_test.go:478: snappy: corrupt input
            
    --- FAIL: TestSnappyCompression/request_1 (0.00s)
        /Users/arthursens/Documents/projetos/opentelemetry-collector-contrib/receiver/prometheusremotewritereceiver/receiver_test.go:477: 
            	Error Trace:	/Users/arthursens/Documents/projetos/opentelemetry-collector-contrib/receiver/prometheusremotewritereceiver/receiver_test.go:477
            	Error:      	Not equal: 
            	            	expected: 204
            	            	actual  : 400
            	Test:       	TestSnappyCompression/request_1
        /Users/arthursens/Documents/projetos/opentelemetry-collector-contrib/receiver/prometheusremotewritereceiver/receiver_test.go:478: snappy: corrupt input
            
FAIL
FAIL	github.com/open-telemetry/opentelemetry-collector-contrib/receiver/prometheusremotewritereceiver	0.370s

I've also done some manual testing, by building the collector with the remotewrite receiver and also with the replace directives. The error I used to see in Prometheus before this change:

time=2025-04-15T21:25:13.165Z level=ERROR source=queue_manager.go:1670 msg="non-recoverable error" component=remote remote_name=2757a8 url=http://localhost:9091/api/v1/write failedSampleCount=563 failedHistogramCount=0 failedExemplarCount=0 err="server returned HTTP status 400 Bad Request: snappy: corrupt input\n"

Has been replaced with a new error 🥳

time=2025-04-15T21:30:56.747Z level=ERROR source=queue_manager.go:1670 msg="non-recoverable error" component=remote remote_name=2757a8 url=http://localhost:9091/api/v1/write failedSampleCount=563 failedHistogramCount=0 failedExemplarCount=0 err="server returned HTTP status 400 Bad Request: unsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_cycles_automatic_gc_cycles_total\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_cycles_forced_gc_cycles_total\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_cycles_total_gc_cycles_total\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_duration_seconds\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_duration_seconds\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_duration_seconds\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_duration_seconds\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_duration_seconds\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_duration_seconds_sum\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_duration_seconds_count\"\nunsupported metric type \"METRIC_TYPE_UNSPECIFIED\" for metric \"go_gc_gogc_percent\"\nunsupported metric type \"METRIC"

Things are still not 100% correct, but at least snappy decoding is not a problem anymore :)