tests: add fips.enable.https

[HuijingHei]

To verify that using TLS works in FIPS mode by having Ignition
fetch a remote resource over HTTPS with FIPS compatible algorithms.

tests/containers: setup nginx only serves files over HTTPS with
FIPS compatible algorithms.

Fixes https://issues.redhat.com/browse/COS-3487

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[gemini-code-assist]

Code Review

This pull request adds a test container fips-nginx to verify file downloads over HTTPS with FIPS-approved cryptography. A thorough security audit found no significant vulnerabilities, though a low-risk issue regarding input validation in build.sh was noted. However, a critical issue in the Containerfile will prevent the container from building, and several suggestions have been made to improve the build.sh script's robustness and cleanliness.

[gemini-code-assist]

It is a best practice to redirect error and usage messages to stderr. This separates normal output from error messages and allows for better output redirection.

Suggested change

	echo "Error: Missing IP address argument"
	echo "Usage: $0 <ip-address>"
	echo "Error: Missing IP address argument" >&2
	echo "Usage: $0 <ip-address>" >&2

[HuijingHei]

Hold on, looks this can only test x86_64, as I just setup the env on x86_64. Do we want to run on all multiarch?