Push REPO_VERSION var into containers for builds

Set `REPO_VERSION` via Podman and Docker container run commands
to properly have any externally set value (e.g., GitHub Actions)
inherited by the container build environment.

See also:

- atc0005/shared-project-resources#208

Makefile

@@ -823,6 +823,7 @@ docker-release-build: clean helper-builder-setup
 	@echo
 	@echo "Using release builder image to generate project release assets"
 	$(CONTAINER_COMMAND) container run \
+		--env REPO_VERSION=$(REPO_VERSION) \
 		--user builduser:builduser \
 		--rm \
 		-i \
@@ -843,6 +844,7 @@ podman-release-build: clean helper-builder-setup
 	@echo
 	@echo "Using release builder image to generate project release assets"
 	$(CONTAINER_COMMAND) container run \
+		--env REPO_VERSION=$(REPO_VERSION) \
 		--rm \
 		-i \
 		-v $$PWD/$(OUTPUTDIR):/builds/$(OUTPUTDIR):rw \
@@ -862,6 +864,7 @@ docker-dev-build: clean helper-builder-setup
 	@echo
 	@echo "Using release builder image to generate project release assets"
 	$(CONTAINER_COMMAND) container run \
+		--env REPO_VERSION=$(REPO_VERSION) \
 		--user builduser:builduser \
 		--rm \
 		-i \
@@ -882,6 +885,7 @@ podman-dev-build: clean helper-builder-setup
 	@echo
 	@echo "Using release builder image to generate project release assets"
 	$(CONTAINER_COMMAND) container run \
+		--env REPO_VERSION=$(REPO_VERSION) \
 		--rm \
 		-i \
 		-v $$PWD/$(OUTPUTDIR):/builds/$(OUTPUTDIR):rw \
@@ -903,6 +907,7 @@ docker-packages: helper-builder-setup
 
 	@echo "Building with $(CONTAINER_COMMAND)"
 	$(CONTAINER_COMMAND) container run \
+		--env REPO_VERSION=$(REPO_VERSION) \
 		--rm \
 		--user builduser:builduser \
 		-i \
@@ -925,6 +930,7 @@ podman-packages: helper-builder-setup
 
 	@echo "Building with $(CONTAINER_COMMAND)"
 	$(CONTAINER_COMMAND) container run \
+		--env REPO_VERSION=$(REPO_VERSION) \
 		--rm \
 		-i \
 		-v $$PWD/$(OUTPUTDIR):/builds/$(OUTPUTDIR):rw \