test: pin the external fixtures and run the suites against the silo binary

The test and verification scripts invoked ./minio and pulled their tooling from
upstream infrastructure with no integrity check. Every `curl | tar` of a client
or an old server binary was an unverified execution path in a script that
regularly runs as a privileged user, and several fetched a floating "latest".

Two installers replace all of it:

- install-mcli.sh resolves a pinned pgsty/mc release, downloads the archive and
  its checksum manifest, requires exactly one valid manifest entry for the
  asset, verifies it, and installs. MCLI_BIN with a mandatory MCLI_SHA256 lets
  an offline or air-gapped run supply its own binary, still checksum-checked.
- install-verified-fixture.sh takes source, expected SHA-256 and target, and
  refuses anything that does not match. Sources may be a URL or a local file.

Every script that previously downloaded mc now calls install-mcli.sh. The three
places that genuinely need an upstream artifact - the old MinIO server binary
for the LDAP IAM upgrade-import test, the 2021 mc for the three-site
replication test, and the functional-tests.sh fixture - go through
install-verified-fixture.sh with the digest recorded inline. Those dl.min.io
URLs remain on purpose: they are historical upstream artifacts needed to prove
upgrade compatibility, and they are now pinned and verified rather than
trusted.

The scripts otherwise switch to ./silo, silo.service, the silo container and
compose service names, and SILO_CONFIG_DIR. run-multi-site-minio-idp.sh is
renamed to run-multi-site-silo-idp.sh with the Makefile target following.
buildscripts/minio-upgrade.sh keeps its name and its `minio server` argv - it
exists to test the MinIO-to-Silo upgrade, so the old side must stay old - but
it is now pinned to an image digest rather than a tag, and its `docker system
prune` and `docker volume prune` calls are removed. Those ran unfiltered
against the developer's whole Docker installation; the resiliency tests had the
same problem and lose their prune and `docker ps -q` sweeps too.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/distributed/iam-import-with-openid.sh

@@ -4,20 +4,19 @@ if [ -n "$TEST_DEBUG" ]; then
 	set -x
 fi
 
-pkill minio
+pkill silo
 docker rm -f $(docker ps -aq)
 rm -rf /tmp/openid{1..4}
 
-export MC_HOST_myminio="http://minioadmin:minioadmin@localhost:22000"
+export MC_HOST_mysilo="http://minioadmin:minioadmin@localhost:22000"
 # The service account used below is already present in iam configuration getting imported
-export MC_HOST_myminio1="http://dillon-service-2:dillon-service-2@localhost:22000"
+export MC_HOST_mysilo1="http://dillon-service-2:dillon-service-2@localhost:22000"
 
-# Start MinIO instance
+# Start Silo instance
 export CI=true
 
 if [ ! -f ./mc ]; then
-	wget --quiet -O mc https://dl.minio.io/client/mc/release/linux-amd64/mc &&
-		chmod +x mc
+	"$(git rev-parse --show-toplevel)/buildscripts/install-mcli.sh" ./mc
 fi
 
 mc -v
@@ -30,12 +29,12 @@ mc -v
 	cd -
 )
 
-(minio server --address :22000 --console-address :10000 http://localhost:22000/tmp/openid{1...4} 2>&1 >/tmp/server.log) &
-./mc ready myminio
-./mc mb myminio/test-bucket
-./mc cp /etc/hosts myminio/test-bucket
+(silo server --address :22000 --console-address :10000 http://localhost:22000/tmp/openid{1...4} 2>&1 >/tmp/server.log) &
+./mc ready mysilo
+./mc mb mysilo/test-bucket
+./mc cp /etc/hosts mysilo/test-bucket
 
-./mc idp openid add myminio \
+./mc idp openid add mysilo \
 	config_url="http://localhost:5556/dex/.well-known/openid-configuration" \
 	client_id="minio-client-app" \
 	client_secret="minio-client-app-secret" \
@@ -44,39 +43,39 @@ mc -v
 	display_name="Login via dex1" \
 	role_policy="consoleAdmin"
 
-./mc admin service restart myminio --json
-./mc ready myminio
-./mc admin cluster iam import myminio docs/distributed/samples/myminio-iam-info-openid.zip
+./mc admin service restart mysilo --json
+./mc ready mysilo
+./mc admin cluster iam import mysilo docs/distributed/samples/myminio-iam-info-openid.zip
 
 # Verify if buckets / objects accessible using service account
 echo "Verifying buckets and objects access for the imported service account"
 
-./mc ls myminio1/ --json
-BKT_COUNT=$(./mc ls myminio1/ --json | jq '.key' | wc -l)
+./mc ls mysilo1/ --json
+BKT_COUNT=$(./mc ls mysilo1/ --json | jq '.key' | wc -l)
 if [ "${BKT_COUNT}" -ne 1 ]; then
 	echo "BUG: Expected no of bucket: 1, Found: ${BKT_COUNT}"
 	exit 1
 fi
 
-BKT_NAME=$(./mc ls myminio1/ --json | jq '.key' | sed 's/"//g' | sed 's\/\\g')
+BKT_NAME=$(./mc ls mysilo1/ --json | jq '.key' | sed 's/"//g' | sed 's\/\\g')
 if [[ ${BKT_NAME} != "test-bucket" ]]; then
 	echo "BUG: Expected bucket: test-bucket, Found: ${BKT_NAME}"
 	exit 1
 fi
 
-./mc ls myminio1/test-bucket
-OBJ_COUNT=$(./mc ls myminio1/test-bucket --json | jq '.key' | wc -l)
+./mc ls mysilo1/test-bucket
+OBJ_COUNT=$(./mc ls mysilo1/test-bucket --json | jq '.key' | wc -l)
 if [ "${OBJ_COUNT}" -ne 1 ]; then
 	echo "BUG: Expected no of objects: 1, Found: ${OBJ_COUNT}"
 	exit 1
 fi
 
-OBJ_NAME=$(./mc ls myminio1/test-bucket --json | jq '.key' | sed 's/"//g')
+OBJ_NAME=$(./mc ls mysilo1/test-bucket --json | jq '.key' | sed 's/"//g')
 if [[ ${OBJ_NAME} != "hosts" ]]; then
 	echo "BUG: Expected object: hosts, Found: ${BKT_NAME}"
 	exit 1
 fi
 
 # Finally kill running processes
-pkill minio
+pkill silo
 docker rm -f $(docker ps -aq)