Rename cloud make targets to s3

Originally we used to have integration tests only for S3 so we decided
to call them "clooud" (tests). We've now added integration tests for
Azure storage driver so calling the S3 one cloud is just opaque and
rather confusing. This commit renamed -cloud- targets to -s3- ones.

Signed-off-by: Milos Gajdos <milosthegajdos@gmail.com>

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
           - 1.23.6
         target:
           - test-coverage
-          - test-cloud-storage # TODO: rename to test-s3-storage
+          - test-s3-storage
           - test-azure-storage
     steps:
       -

BUILDING.md

@@ -110,7 +110,7 @@ You must have a [docker compose](https://docs.docker.com/compose/) compatible to
 
 Start the local cloud environment:
 ```
-make start-cloud-storage
+make start-s3-storage
 ```
 There is a sample registry configuration file that lets you point the registry to the started storage:
 ```
@@ -125,5 +125,5 @@ AWS_ACCESS_KEY=distribution \
 ```
 Stop the local storage when done:
 ```
-make stop-cloud-storage
+make stop-s3-storage
 ```

Makefile

@@ -122,26 +122,26 @@ test-coverage: ## run unit tests and generate test coverprofiles
 		fi; \
 	done )
 
-.PHONY: test-cloud-storage
-test-cloud-storage: start-cloud-storage run-s3-tests stop-cloud-storage ## run cloud storage driver tests
+.PHONY: test-s3-storage
+test-s3-storage: start-s3-storage run-s3-tests stop-s3-storage ## run s3 storage driver tests
 
-.PHONY: start-cloud-storage
-start-cloud-storage: ## start local cloud storage (minio)
+.PHONY: start-s3-storage
+start-s3-storage: ## start local s3 storage (minio)
 	$(COMPOSE) -f tests/docker-compose-storage.yml up minio minio-init -d
 
-.PHONY: stop-cloud-storage
-stop-cloud-storage: ## stop local cloud storage (minio)
+.PHONY: stop-s3-storage
+stop-s3-storage: ## stop local s3 storage (minio)
 	$(COMPOSE) -f tests/docker-compose-storage.yml down
 
-.PHONY: reset-cloud-storage
-reset-cloud-storage: ## reset (stop, delete, start) local cloud storage (minio)
+.PHONY: reset-s3-storage
+reset-s3-storage: ## reset (stop, delete, start) local cloud storage (minio)
 	$(COMPOSE) -f tests/docker-compose-storage.yml down
 	@mkdir -p tests/miniodata/distribution
 	@rm -rf tests/miniodata/distribution/* tests/miniodata/.minio.sys
 	$(COMPOSE) -f tests/docker-compose-storage.yml up minio minio-init -d
 
 .PHONY: run-s3-tests
-run-s3-tests: start-cloud-storage ## run S3 storage driver integration tests
+run-s3-tests: start-s3-storage ## run S3 storage driver integration tests
 	AWS_ACCESS_KEY=distribution \
 	AWS_SECRET_KEY=password \
 	AWS_REGION=us-east-1 \