[misc] Pull the MinIO test image from quay.io (#7516)

The minio/minio repository is no longer on Docker Hub: the repo and the
pinned tag both return 404 and anonymous pulls are refused, so
Test_S3HandlerGetUploadURL fails on every Linux CI run with "pull access
denied for minio/minio".

The same release is published at quay.io/minio/minio, digest
sha256:a1ea29fa28355559ef137d71fc570e508a214ec84ff8083e39bc5428980b015e,
so the testcontainers request points there and keeps the pinned tag.