Add `curl` to the `iceberg-rest-fixture` docker container

[Fokko]

Feature Request / Improvement

While checking the integration tests on Iceberg-rust (apache/iceberg-rust#748 specifically), it might be nice to add curl to the docker image to enable the health check. With this health check, we no longer have to add logic (we have a loop in Iceberg-rust and a 10-second sleep in PyIceberg) to check if the container is alive and kicking.

Query engine

None

Willingness to contribute

• I can contribute this improvement/feature independently
• I would be willing to contribute this improvement/feature with guidance from the Iceberg community
• I cannot contribute this improvement/feature at this time