replace arduino/setup-protoc@v3 (#10484)

## What changed?

Replacing `arduino/setup-protoc` GitHub action.

## Why?

https://github.com/arduino/setup-protoc hasn't been updated in 2y and is
causing this warning:
```
Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: arduino/setup-protoc@v3. Actions will be forced to run with Node.js 24 by default starting June 16th, 2026. Node.js 20 will be removed from the runner on September 16th, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
```

.github/mise.toml

@@ -0,0 +1,2 @@
+[tools]
+protoc = "23.4"

.github/workflows/linters.yml

@@ -37,9 +37,10 @@ jobs:
           check-latest: true
           cache: true
 
-      - uses: arduino/setup-protoc@v3
+      - uses: jdx/mise-action@v4
         with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          working_directory: .github
+          install_args: protoc
 
       - name: lint protobuf definitions
         run: |
@@ -58,9 +59,10 @@ jobs:
           check-latest: true
           cache: true
 
-      - uses: arduino/setup-protoc@v3
+      - uses: jdx/mise-action@v4
         with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          working_directory: .github
+          install_args: protoc
 
       - name: lint protobuf API definitions
         run: |
@@ -79,9 +81,10 @@ jobs:
           check-latest: true
           cache: true
 
-      - uses: arduino/setup-protoc@v3
+      - uses: jdx/mise-action@v4
         with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          working_directory: .github
+          install_args: protoc
 
       - name: lint system workflows with workflowcheck
         run: make workflowcheck

.github/workflows/run-tests.yml

@@ -277,9 +277,10 @@ jobs:
           path: ~/.cache/go-build
           key: go-${{ runner.os }}${{ runner.arch }}-build-${{ env.COMMIT }}
 
-      - uses: arduino/setup-protoc@v3
+      - uses: jdx/mise-action@v4
         with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          working_directory: .github
+          install_args: protoc
 
       - run: GOOS=windows GOARCH=amd64 make clean-bins bins