CI - Cancel runs on new pushes (#3501)

# Description of Changes

Add `cancel-in-progress` to our GitHub workflows.

# API and ABI breaking changes

None

# Expected complexity level and risk

1

# Testing

- [x] Pushing new commits to this PR causes cancels of previous CI runs

---------

Co-authored-by: Zeke Foppa <bfops@users.noreply.github.com>

Author: bfops

.github/workflows/ci.yml

@@ -13,6 +13,12 @@ on:
 
 name: CI
 
+concurrency:
+  # When a PR number isn't available, the event won't be a `pull_request` event so it won't matter.
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  # Only cancel when the event is a pull_request
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   docker_smoketests:
     name: Smoketests

.github/workflows/csharp-test.yml

@@ -6,6 +6,12 @@ on:
       - master
   pull_request:
 
+concurrency:
+  # When a PR number isn't available, the event won't be a `pull_request` event so it won't matter.
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  # Only cancel when the event is a pull_request
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   unity-testsuite:
     runs-on: spacetimedb-runner

.github/workflows/internal-tests.yml

@@ -9,6 +9,12 @@ name: Internal Tests
 permissions:
   contents: read
 
+concurrency:
+  # When a PR number isn't available, the event won't be a `pull_request` event so it won't matter.
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  # Only cancel when the event is a pull_request
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   run-tests:
     runs-on: ubuntu-latest

.github/workflows/typescript-test.yml

@@ -7,6 +7,12 @@ on:
   pull_request:
   merge_group:
 
+concurrency:
+  # When a PR number isn't available, the event won't be a `pull_request` event so it won't matter.
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  # Only cancel when the event is a pull_request
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   build-and-test:
     runs-on: ubuntu-latest