Fix test compilation errors and test failures

- Add missing helper functions and constants to test files
- Fix TestAccGrant_role test to skip on TiDB (roles not supported)
- Remove conflicting privileges from role grant configs
- Update test assertions to use roles.0 instead of role attribute
- Add missing imports (terraform, errors, database/sql, log, strings)
- Fix all compilation errors introduced during testcontainers migration

Author: zph

GORELEASER_GPGSIGNING_PLAN.md

@@ -123,13 +123,13 @@ testversion%: ## Run tests against MySQL version (e.g., testversion8.0) [backwar
 		docker rmi mysql:$* 2>/dev/null || true; \
 		docker manifest rm mysql:$* 2>/dev/null || true; \
 		docker pull --platform linux/amd64 mysql:$* 2>&1 | grep -v "no match" || true; \
-		DOCKER_DEFAULT_PLATFORM=linux/amd64 DOCKER_IMAGE=mysql:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS).*WithTestcontainers",-run WithTestcontainers) -timeout=30m; \
+		DOCKER_DEFAULT_PLATFORM=linux/amd64 DOCKER_IMAGE=mysql:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS)",) -timeout=30m; \
 	else \
-		DOCKER_IMAGE=mysql:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS).*WithTestcontainers",-run WithTestcontainers) -timeout=30m; \
+		DOCKER_IMAGE=mysql:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS)",) -timeout=30m; \
 	fi
 
 testversion: ## Run tests against MySQL version (set MYSQL_VERSION)
-	@DOCKER_IMAGE=mysql:$(MYSQL_VERSION) PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS).*WithTestcontainers",-run WithTestcontainers) -timeout=30m
+	@DOCKER_IMAGE=mysql:$(MYSQL_VERSION) PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS)",) -timeout=30m
 
 # Percona test targets - use testcontainers
 # Preferred format: test-percona-VERSION (e.g., test-percona-8.0)
@@ -144,10 +144,10 @@ testpercona%: ## Run tests against Percona version (e.g., testpercona8.0) [backw
 		docker manifest rm percona:$* 2>/dev/null || true; \
 		docker pull --platform linux/amd64 percona:$* || true; \
 	fi
-	@DOCKER_IMAGE=percona:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS).*WithTestcontainers",-run WithTestcontainers) -timeout=30m
+	@DOCKER_IMAGE=percona:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS)",) -timeout=30m
 
 testpercona: ## Run tests against Percona version (set MYSQL_VERSION)
-	@DOCKER_IMAGE=percona:$(MYSQL_VERSION) PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS).*WithTestcontainers",-run WithTestcontainers) -timeout=30m
+	@DOCKER_IMAGE=percona:$(MYSQL_VERSION) PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS)",) -timeout=30m
 
 testrdsdb%: ## Run tests against RDS MySQL version (requires MYSQL_ENDPOINT env vars)
 	$(MAKE) MYSQL_VERSION=$* MYSQL_USERNAME=${MYSQL_USERNAME} MYSQL_HOST=$(shell echo ${MYSQL_ENDPOINT} | cut -d: -f1) MYSQL_PASSWORD=${MYSQL_PASSWORD} MYSQL_PORT=$(shell echo ${MYSQL_ENDPOINT} | cut -d: -f2) testrdsdb
@@ -163,21 +163,21 @@ test-tidb-%: ## Run tests against TiDB version (e.g., test-tidb-8.5.3)
 	@$(MAKE) testtidb$*
 
 testtidb%: ## Run tests against TiDB version (e.g., testtidb8.5.3) [backwards compatible]
-	@DOCKER_IMAGE=tidb:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS).*WithTestcontainers",-run WithTestcontainers) -timeout=30m
+	@DOCKER_IMAGE=tidb:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS)",) -timeout=30m
 
 testtidb: ## Run tests against TiDB version (set MYSQL_VERSION)
-	@DOCKER_IMAGE=tidb:$(MYSQL_VERSION) PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS).*WithTestcontainers",-run WithTestcontainers) -timeout=30m
+	@DOCKER_IMAGE=tidb:$(MYSQL_VERSION) PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS)",) -timeout=30m
 
 # MariaDB test targets - use testcontainers
 # Preferred format: test-mariadb-VERSION (e.g., test-mariadb-10.10)
 test-mariadb-%: ## Run tests against MariaDB version (e.g., test-mariadb-10.10)
 	@$(MAKE) testmariadb$*
 
 testmariadb%: ## Run tests against MariaDB version (e.g., testmariadb10.10) [backwards compatible]
-	@DOCKER_IMAGE=mariadb:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS).*WithTestcontainers",-run WithTestcontainers) -timeout=30m
+	@DOCKER_IMAGE=mariadb:$* PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS)",) -timeout=30m
 
 testmariadb: ## Run tests against MariaDB version (set MYSQL_VERSION)
-	@DOCKER_IMAGE=mariadb:$(MYSQL_VERSION) PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS).*WithTestcontainers",-run WithTestcontainers) -timeout=30m
+	@DOCKER_IMAGE=mariadb:$(MYSQL_VERSION) PATH="$(CURDIR)/bin:${PATH}" TF_ACC=1 GOTOOLCHAIN=auto go test -tags=testcontainers ./mysql/... -v $(if $(TESTARGS),-run "$(TESTARGS)",) -timeout=30m
 
 vet: ## Run go vet
 	@echo "go vet ."