chore: Specify Xcode_16 application name same as on Github runner (#831)

Author: jbelkins

.github/workflows/continuous-integration.yml

@@ -12,8 +12,6 @@ env:
 jobs:
   apple-ci:
     runs-on: ${{ matrix.runner }}
-    env:
-      DEVELOPER_DIR: /Applications/${{ matrix.xcode }}.app/Contents/Developer
     strategy:
       fail-fast: false
       matrix:
@@ -23,7 +21,7 @@ jobs:
           - macos-14
         xcode:
           - Xcode_15.2
-          - Xcode_16.0
+          - Xcode_16
         destination:
           - 'platform=iOS Simulator,OS=17.2,name=iPhone 15'
           - 'platform=iOS Simulator,OS=18.0,name=iPhone 15'
@@ -33,21 +31,25 @@ jobs:
         exclude:
           # Don't run old macOS with new Xcode
           - runner: macos-13
-            xcode: Xcode_16.0
+            xcode: Xcode_16
           # Don't run new macOS with old Xcode
           - runner: macos-14
             xcode: Xcode_15.2
           # Don't run old iOS/tvOS simulator with new Xcode
           - destination: 'platform=iOS Simulator,OS=17.2,name=iPhone 15'
-            xcode: Xcode_16.0
+            xcode: Xcode_16
           - destination: 'platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (at 1080p)'
-            xcode: Xcode_16.0
+            xcode: Xcode_16
           # Don't run new iOS/tvOS simulator with old Xcode
           - destination: 'platform=iOS Simulator,OS=18.0,name=iPhone 15'
             xcode: Xcode_15.2
           - destination: 'platform=tvOS Simulator,OS=18.0,name=Apple TV 4K (3rd generation) (at 1080p)'
             xcode: Xcode_15.2
     steps:
+      - name: Configure Xcode
+        run: |
+          sudo xcode-select -s /Applications/${{ matrix.xcode }}.app
+          xcode-select -p
       - name: Checkout smithy-swift
         uses: actions/checkout@v4
       - name: Cache Gradle
@@ -89,8 +91,6 @@ jobs:
 
   apple-downstream:
     runs-on: ${{ matrix.runner }}
-    env:
-      DEVELOPER_DIR: /Applications/${{ matrix.xcode }}.app/Contents/Developer
     strategy:
       fail-fast: false
       matrix:
@@ -100,7 +100,7 @@ jobs:
           - macos-14
         xcode:
           - Xcode_15.2
-          - Xcode_16.0
+          - Xcode_16
         destination:
           - 'platform=iOS Simulator,OS=17.2,name=iPhone 15'
           - 'platform=iOS Simulator,OS=18.0,name=iPhone 15'
@@ -110,21 +110,25 @@ jobs:
         exclude:
           # Don't run old macOS with new Xcode
           - runner: macos-13
-            xcode: Xcode_16.0
+            xcode: Xcode_16
           # Don't run new macOS with old Xcode
           - runner: macos-14
             xcode: Xcode_15.2
           # Don't run old iOS/tvOS simulator with new Xcode
           - destination: 'platform=iOS Simulator,OS=17.2,name=iPhone 15'
-            xcode: Xcode_16.0
+            xcode: Xcode_16
           - destination: 'platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (at 1080p)'
-            xcode: Xcode_16.0
+            xcode: Xcode_16
           # Don't run new iOS/tvOS simulator with old Xcode
           - destination: 'platform=iOS Simulator,OS=18.0,name=iPhone 15'
             xcode: Xcode_15.2
           - destination: 'platform=tvOS Simulator,OS=18.0,name=Apple TV 4K (3rd generation) (at 1080p)'
             xcode: Xcode_15.2
     steps:
+      - name: Configure Xcode
+        run: |
+          sudo xcode-select -s /Applications/${{ matrix.xcode }}.app
+          xcode-select -p
       - name: Checkout smithy-swift
         uses: actions/checkout@v4
       - name: Select aws-sdk-swift branch