[Issue] honor queue_consumer.xml maxMessages

[m2-assistant]

This issue is automatically created based on existing pull request: #28995: honor queue_consumer.xml maxMessages

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Summary (*)

Magento 2.4-develop
The maxMessages="100" attribute in app/code/Magento/MediaStorage/etc/queue_consumer.xml for instance is not being used. Instead only deployment configuration is used.

Examples (*)

1. install vanilla Magento and run pgrep -fl queue:consumers:start
2. see that all consumers have --max-messages=10000
3. apply the PR
4. run pkill -f queue:consumers:start
5. wait for cron to restart the consumers
6. see that the values from queue_consumer.xml are used with a fallback and max of the deployment config or 10000 if that is not set.

Proposed solution

[m2-assistant]

Hi @engcom-Delta. Thank you for working on this issue.
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