[exporter/awsxray] Add support for AWS X-Ray annotations attribute in exporter.

[jefchien]

Description: If the original segment received by the awsxrayreceiver had annotations, adds an aws.xray.annotations attribute to the translated spans. The attribute is a slice attribute that contains each of the string keys. If found on the span, the awsxrayexporter will use them in addition to the indexed_attributes configuration field when categorizing the attributes.

Link to tracking Issue: #17550

Testing: Updated and added unit tests.

Documentation: None

[runforesight]

Foresight Summary

    
Major Impacts

build-and-test-windows duration(5 seconds) has decreased 41 minutes 27 seconds compared to main branch avg(41 minutes 32 seconds).

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⭕  build-and-test-windows workflow has finished in 5 seconds (41 minutes 16 seconds less than main branch avg.) and finished at 25th Jan, 2023.

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Job	Failed Steps	Tests
windows-unittest-matrix	-     🔗	N/A	See Details
windows-unittest	-     🔗	N/A	See Details

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✅  tracegen workflow has finished in 1 minute 12 seconds (1 minute 15 seconds less than main branch avg.) and finished at 25th Jan, 2023.

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build-dev	-     🔗	N/A	See Details
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publish-stable	-     🔗	N/A	See Details

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✅  telemetrygen workflow has finished in 2 minutes 45 seconds and finished at 25th Jan, 2023.

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✅  check-links workflow has finished in 3 minutes 3 seconds (⚠️ 1 minute 11 seconds more than main branch avg.) and finished at 25th Jan, 2023.

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✅  changelog workflow has finished in 3 minutes 25 seconds (⚠️ 1 minute 20 seconds more than main branch avg.) and finished at 25th Jan, 2023.

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✅  prometheus-compliance-tests workflow has finished in 14 minutes 8 seconds (⚠️ 6 minutes 32 seconds more than main branch avg.) and finished at 25th Jan, 2023.

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Job	Failed Steps	Tests
prometheus-compliance-tests	-     🔗	✅ 21  ❌ 0  ⏭ 0    🔗	See Details

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✅  load-tests workflow has finished in 20 minutes 11 seconds (⚠️ 5 minutes 51 seconds more than main branch avg.) and finished at 25th Jan, 2023.

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Job	Failed Steps	Tests
loadtest (TestIdleMode)	-     🔗	✅ 1  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestTraceAttributesProcessor)	-     🔗	✅ 3  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestMetric10kDPS|TestMetricsFromFile)	-     🔗	✅ 6  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestTraceNoBackend10kSPS|TestTrace1kSPSWithAttrs)	-     🔗	✅ 8  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestTraceBallast1kSPSWithAttrs|TestTraceBallast1kSPSAddAttrs)	-     🔗	✅ 10  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestMetricResourceProcessor|TestTrace10kSPS)	-     🔗	✅ 12  ❌ 0  ⏭ 0    🔗	See Details
loadtest (TestBallastMemory|TestLog10kDPS)	-     🔗	✅ 19  ❌ 0  ⏭ 0    🔗	See Details
setup-environment	-     🔗	N/A	See Details

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✅  build-and-test workflow has finished in 44 minutes 4 seconds (8 minutes 5 seconds less than main branch avg.) and finished at 26th Jan, 2023.

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Job	Failed Steps	Tests
lint-matrix (other)	-     🔗	N/A	See Details
lint	-     🔗	N/A	See Details
cross-compile (darwin, amd64)	-     🔗	N/A	See Details
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cross-compile (linux, ppc64le)	-     🔗	N/A	See Details
cross-compile (windows, 386)	-     🔗	N/A	See Details
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publish-check	-     🔗	N/A	See Details
publish-stable	-     🔗	N/A	See Details
publish-dev	-     🔗	N/A	See Details

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[willarmiros]

@wangzlei will review on my behalf

[mxiamxia]

LGTM! Thanks

[dmitryax]

@jefchien please rebase

[jefchien]

@dmitryax rebased the PR

[jefchien]

Rebased again due to go.mod merge conflict