workflows: Enable end-to-end tests in CI

Author: euanh

.github/workflows/pull_request.yml

@@ -9,7 +9,7 @@ jobs:
     name: Test
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
     with:
-      linux_pre_build_command: apt-get update && apt-get install -y locales locales-all libsqlite3-dev
+      linux_pre_build_command: apt-get update && apt-get install -y locales locales-all libsqlite3-dev docker
       enable_windows_checks: false
   soundness:
     name: Soundness

Tests/SwiftSDKGeneratorTests/EndToEndTests.swift

@@ -121,9 +121,7 @@ final class RepeatedBuildTests: XCTestCase {
   private let logger = Logger(label: "swift-sdk-generator")
 
   func testRepeatedSDKBuilds() async throws {
-    if ProcessInfo.processInfo.environment.keys.contains("JENKINS_URL")
-      || ProcessInfo.processInfo.environment.keys.contains("GITHUB_ACTIONS")
-    {
+    if ProcessInfo.processInfo.environment.keys.contains("JENKINS_URL") {
       throw XCTSkip(
         "EndToEnd tests cannot currently run in CI: https://github.com/swiftlang/swift-sdk-generator/issues/145"
       )