chore: remove .NET 6 support from build configurations

Author: hjgraca

.github/workflows/build.yml

@@ -27,7 +27,6 @@ jobs:
         uses: actions/setup-dotnet@d4c94342e560b34958eacfc5d055d21461ed1c5d # 5.0.0
         with:
           dotnet-version: |
-            6.0.x
             8.0.x
 
       - name: Install dependencies

.github/workflows/examples-tests.yml

@@ -27,7 +27,6 @@ jobs:
         uses: actions/setup-dotnet@d4c94342e560b34958eacfc5d055d21461ed1c5d # 5.0.0
         with:
           dotnet-version: |
-            6.0.x
             8.0.x
 
       - name: Install dependencies

.github/workflows/publish-artifacts-examples-tests.yml

@@ -33,7 +33,6 @@ jobs:
         uses: actions/setup-dotnet@d4c94342e560b34958eacfc5d055d21461ed1c5d # 5.0.0
         with:
           dotnet-version: |
-            6.0.x
             8.0.x
 
       - name: Build libraries
@@ -64,7 +63,6 @@ jobs:
         uses: actions/setup-dotnet@d4c94342e560b34958eacfc5d055d21461ed1c5d # 5.0.0
         with:
           dotnet-version: |
-            6.0.x
             8.0.x
 
       - name: Download packages
@@ -124,7 +122,6 @@ jobs:
         uses: actions/setup-dotnet@d4c94342e560b34958eacfc5d055d21461ed1c5d # 5.0.0
         with:
           dotnet-version: |
-            6.0.x
             8.0.x
 
       - name: Setup GitHub Packages source

libraries/tests/e2e/InfraShared/FunctionConstruct.cs

@@ -10,10 +10,10 @@ public class FunctionConstruct : Construct
 
     public FunctionConstruct(Construct scope, string id, FunctionConstructProps props) : base(scope, id)
     {
-        var framework = props.Runtime == Runtime.DOTNET_6 ? "net6.0" : "net8.0";
+        var framework = "net8.0";
         var distPath = $"{props.DistPath}/deploy_{props.Architecture.Name}_{props.Runtime.Name}.zip";
         var command = props.IsAot
-            ? $"dotnet-lambda package -pl {props.SourcePath} -cmd ../../../ -o {distPath} -f net8.0 -farch {props.Architecture.Name} -cifb public.ecr.aws/sam/build-dotnet8"
+            ? $"dotnet-lambda package -pl {props.SourcePath} -cmd ../../../ -o {distPath} -farch {props.Architecture.Name} -cifb public.ecr.aws/sam/build-dotnet8"
             : $"dotnet-lambda package -pl {props.SourcePath} -o {distPath} -f {framework} -farch {props.Architecture.Name}";
 
         Console.WriteLine(command);