https://datadoghq.atlassian.net/browse/SVLS-7256

fix: Skip flush retries on invalid DD_API_KEY to reduce CPU overhead

When Lambda functions are configured with an invalid DD_API_KEY, the DD extension
continuously retries log flushing, causing unnecessary CPU consumption and
impacting runtime performance. This change detects invalid API key errors and
skips further flush attempts to minimize the impact of misconfiguration.

Header	Header	Header
	Without the change	With the change
Log	Link	Link
Observation	Failed on retries	Failed and moved on upon detecting permission error
Manifest