chore: downgrade devcontainer to 22

+ remove optional cli

Signed-off-by: Hellgren Heikki <heikki.hellgren@op.fi>

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/devcontainers/typescript-node:24
+FROM mcr.microsoft.com/devcontainers/typescript-node:22
 
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
     && apt-get -y install chromium \

package.json

@@ -134,7 +134,6 @@
     "@backstage/eslint-plugin": "workspace:*",
     "@backstage/repo-tools": "workspace:*",
     "@changesets/cli": "^2.14.0",
-    "@devcontainers/cli": "^0.81.1",
     "@jest/environment-jsdom-abstract": "^30",
     "@octokit/rest": "^19.0.3",
     "@playwright/test": "^1.32.3",

yarn.lock

@@ -8580,15 +8580,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@devcontainers/cli@npm:^0.81.1":
-  version: 0.81.1
-  resolution: "@devcontainers/cli@npm:0.81.1"
-  bin:
-    devcontainer: devcontainer.js
-  checksum: 10/269c88697af36823d6d5d128dd8c08f28714ffd7050d76965da90907bbf579411162a2d499cf3d7ff2d37f442b5419db58d936e5a828b812d4b3d555c923a578
-  languageName: node
-  linkType: hard
-
 "@elastic/elasticsearch-mock@npm:^1.0.0":
   version: 1.0.0
   resolution: "@elastic/elasticsearch-mock@npm:1.0.0"
@@ -45536,7 +45527,6 @@ __metadata:
     "@backstage/eslint-plugin": "workspace:*"
     "@backstage/repo-tools": "workspace:*"
     "@changesets/cli": "npm:^2.14.0"
-    "@devcontainers/cli": "npm:^0.81.1"
     "@jest/environment-jsdom-abstract": "npm:^30"
     "@manypkg/get-packages": "npm:^1.1.3"
     "@octokit/rest": "npm:^19.0.3"