Added HTTP Check for FIPS endpoint

[jeremymcgee73]

Issue #, if available:
#1984
Description of changes:

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There is a bug when you have enabled FIPS on the image, in a region with FIPS endpoints, and have VPC endpoints enabled. The issue is that the check implemented in #1524 , checks to see if the FIPS endpoint resolves. In an isolated environment, the endpoint does resolve. But, there is not a FIPS enabled ECR VPC endpoint available. I switched the check from being a DNS request, to a HTTP call.

Testing Done
I used packer to build an Al2023 node with FIPS enabled to test. I also used the same code in a RHEL build downstream.

See this guide for recommended testing for PRs. Some tests may not apply. Completing tests and providing additional validation steps are not required, but it is recommended and may reduce review time and time to merge.

[jeremymcgee73]

Yeah, that could be the case. I need to test to make sure its not throwing an error, and is always using the non FIPS endpoint.

[cartermckinnon]

This is going to be obsolete after #2000, which removes the dependency on ECR entirely.