CAMEL-19325: Add default identity support

[ank19]

Description

See https://issues.apache.org/jira/browse/CAMEL-19325: Adding support for default identity authentication. @oscerd : I removed the validation part for the authentication, as you did for the datalake last time in a similiar case. Hope that's fine.

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Components tested:

Total	Tested	Failed ❌	Passed ✅
1	1	0	1