Merged PR 13214836: change to installing musl-gcc

change to installing musl-gcc

----
#### AI description  (iteration 1)
#### PR Classification
This PR updates the build configuration by switching the installed compiler from gcc-multilib to musi-gcc and adjusting the build projects list.

#### PR Summary
The changes update the installation command in the pipeline and modify the build script to include the current directory in the project sequence.
- `/.pipelines/DSC-Official.yml`: Replace installing gcc-multilib with installing musi-gcc and comment out the original command.
- `/build.ps1`: Add the current directory (`"."`) to the list of build projects.
<!-- GitOpsUserAgent=GitOps.Apps.Server.pullrequestcopilot -->

Author: SteveL-PowerShell

.pipelines/DSC-Official.yml

@@ -271,7 +271,8 @@ extends:
             apt -y install clang
             apt -y install llvm
             apt -y install musl-tools
-            apt -y install gcc-multilib
+            apt -y install musi-gcc
+            #apt -y install gcc-multilib
             apt -y install libssl-dev
             apt -y install pkg-config
             msrustup default stable-aarch64-unknown-linux-musl

build.ps1

@@ -309,6 +309,7 @@ if (!$SkipBuild) {
 
     # projects are in dependency order
     $projects = @(
+        ".",
         "tree-sitter-dscexpression",
         "tree-sitter-ssh-server-config",
         "security_context_lib",