[internal/comparetest] comparetest enhancement

[fatsheep9146]

The comparetest package has several enhancements need to be done. This issue is used to record

Metrics:

• [internal/comparetest] Add support for all metric types #17538
• [internal/comparetest] Compare exemplars #17580

Traces:

• [internal/scrapertest] Add traces support #17414
• [internal/scrapertest] Traces support IgnoreResourceAttributeValue compare option #17588
• [pkg/pdatatest] add more test for traces #18030
• [pkg/pdatatest] Expand comparison span links and events #18049

All types:

• [internal/comparetest] Make all the exported functions not mutating #17549
• [internal/comparetest] Do not sort slices by default, use options instead #17551
• [internal/comparetest] Ensure all the fields are checked #17865

@open-telemetry/collector-contrib-approvers @open-telemetry/collector-contrib-maintainer Please feel free to add more enhancements!

[github-actions]

Pinging code owners for internal/comparetest: @djaglowski. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

Pinging code owners:

• internal/comparetest: @djaglowski

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[dmitryax]

Thanks, @fatsheep9146. I added couple of issues

[github-actions]

Pinging code owners for pkg/pdatatest: @djaglowski. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[dmitryax]

All tasks are resolved! 🎉

[djaglowski]

Thanks for all the work on this @fatsheep9146. The package is much cleaner and more useful.