[updatecli] update elastic stack version for testing 8.10.3-aa09190a

[apmmachine]

Generated automatically with https://github.com/elastic/beats/actions/runs/6301222277

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Bump elastic-stack to latest snapshot version

Update snapshot.yml

1 file(s) updated with "$1:8.10.3-aa09190a-SNAPSHOT": * testing/environments/snapshot.yml

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• Start Time: 2023-09-25T15:09:11.292+0000

• Duration: 83 min 19 sec

Test stats 🧪

Test	Results
Failed	0
Passed	28162
Skipped	2015
Total	30177

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