Revert GitHub actions and Azure pipelines back to npm ci

All build and deployment pipelines should use npm ci for reproducible builds:
- .github/actions/npm-ci/action.yml
- .github/actions/build-vsix/action.yml
- build/azure-pipeline.stable.yml
- build/azure-pipeline.pre-release.yml

Only the post-checkout git hook and devcontainer files now use npm install.

Author: devin-ai-integration[bot]

.github/actions/build-vsix/action.yml

@@ -9,8 +9,8 @@ outputs:
 runs:
   using: 'composite'
   steps:
-    # This is faster than running `npm install`, we do not want to build zmq, as its already built by us.
-    - run: npm install --ignore-scripts --prefer-offline --no-audit
+    # This is faster than running `npm ci`, we do not want to build zmq, as its already built by us.
+    - run: npm ci --ignore-scripts --prefer-offline --no-audit
       shell: bash
 
     # Run again, as the download of zmq binaries could have failed with 403 errors

.github/actions/npm-ci/action.yml

@@ -1,10 +1,10 @@
-name: 'Install dependencies (npm install)'
+name: 'Install dependencies (npm ci)'
 description: 'npm install (with GITHUB_TOKEN to run postinstall step)'
 
 runs:
   using: 'composite'
   steps:
-    - run: npm install --foreground-scripts --prefer-offline
+    - run: npm ci --foreground-scripts --prefer-offline
       env:
         npm_config_build_from_source: true
       shell: bash

build/azure-pipeline.pre-release.yml

@@ -73,8 +73,8 @@ extends:
           addToPath: true
           architecture: 'x64'
 
-      - script: npm install --foreground-scripts
-        displayName: npm install
+      - script: npm ci --foreground-scripts
+        displayName: npm ci
         env:
           npm_config_build_from_source: true
           VSC_VSCE_TARGET: $(vsceTarget)

build/azure-pipeline.stable.yml

@@ -67,8 +67,8 @@ extends:
           addToPath: true
           architecture: 'x64'
 
-      - script: npm install --foreground-scripts
-        displayName: npm install
+      - script: npm ci --foreground-scripts
+        displayName: npm ci
         env:
           npm_config_build_from_source: true
           VSC_VSCE_TARGET: $(vsceTarget)