Test Podman Feature builds with chroot isolation

Use Buildah chroot isolation for the hosted runner's rootless Podman Feature builds while retaining the Docker-in-Docker Feature coverage.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: chrmarti

src/test/cli.podman.test.ts

@@ -15,6 +15,12 @@ describe('Dev Containers CLI using Podman', function () {
 
 	const tmp = path.relative(process.cwd(), path.join(__dirname, 'tmp'));
 	const cli = `npx --prefix ${tmp} devcontainer`;
+	const podmanBuildOptions = {
+		env: {
+			...process.env,
+			BUILDAH_ISOLATION: 'chroot',
+		},
+	};
 
 	before('Install', async () => {
 		await shellExec(`rm -rf ${tmp}/node_modules`);
@@ -57,7 +63,7 @@ describe('Dev Containers CLI using Podman', function () {
 				' && echo "Build RUN _apt write check: succeeded"',
 				'',
 			].join('\n'));
-			const buildProbe = await shellExec(`podman buildx build --no-cache -f ${probeDockerfile} ${path.dirname(probeDockerfile)}`);
+			const buildProbe = await shellExec(`podman buildx build --no-cache -f ${probeDockerfile} ${path.dirname(probeDockerfile)}`, podmanBuildOptions);
 			console.log(buildProbe.stdout);
 			console.error(buildProbe.stderr);
 		}
@@ -67,7 +73,7 @@ describe('Dev Containers CLI using Podman', function () {
 	describe('Command up using Podman', () => {
 
 		it('should execute successfully with valid config with features', async () => {
-			const res = await shellExec(`${cli} up --docker-path podman --workspace-folder ${__dirname}/configs/image-with-features`);
+			const res = await shellExec(`${cli} up --docker-path podman --workspace-folder ${__dirname}/configs/image-with-features`, podmanBuildOptions);
 			const response = JSON.parse(res.stdout);
 			assert.equal(response.outcome, 'success');
 			const containerId: string = response.containerId;
@@ -76,7 +82,7 @@ describe('Dev Containers CLI using Podman', function () {
 		});
 
 		it('should execute successfully with valid config with features', async () => {
-			const res = await shellExec(`${cli} up --docker-path podman --workspace-folder ${__dirname}/configs/dockerfile-with-features`);
+			const res = await shellExec(`${cli} up --docker-path podman --workspace-folder ${__dirname}/configs/dockerfile-with-features`, podmanBuildOptions);
 			const response = JSON.parse(res.stdout);
 			assert.equal(response.outcome, 'success');
 			const containerId: string = response.containerId;