bug: vscode extensions could be installed in wrong platform.

[n063h]

Are you use the envd server?

• Yes, I am using the envd server.
• No, I am not using the envd server.

Describe the bug

When I connect to dev-container of envd, I found the vscode prompt an error msg

Unfortunately we don't ship binaries for your platform yet. You need to manually clone the rust-analyzer repository and run cargo xtask install --server to build the language server from sources. If you feel that your platform should be supported, please create an issue about that here and we will consider it.

To Reproduce

envd up with

# syntax=v1

def rust():
    """Install Rust."""
    install.apt_packages(name=["build-essential"])
    run(
        [
            "curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y",
        ]
    )
    runtime.environ(extra_path=["/home/envd/.cargo/bin"])
    
def build():
    base(dev=True)
    rust()
    install.vscode_extensions(["rust-lang.rust-analyzer"])
    runtime.init(["make install"])

Connect to the dev-container and run ls ~/.vscode-server/extensions/rust-lang.rust-analyzer/server/，you can see the rust-analyzer binary filename endwith '.exe'. which means envd installed a win32 extension in a linux container.

Expected behavior

rust-lang.rust-analyzer extension works.

The docker info output

Client:
Context: default
Debug Mode: false
Plugins:
buildx: Docker Buildx (Docker Inc., v0.9.1)
compose: Docker Compose (Docker Inc., v2.12.2)
dev: Docker Dev Environments (Docker Inc., v0.0.3)
extension: Manages Docker extensions (Docker Inc., v0.2.13)
sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc., 0.6.0)
scan: Docker Scan (Docker Inc., v0.21.0)

Server:
Containers: 1
Running: 1
Paused: 0
Stopped: 0
Images: 6
Server Version: 20.10.21
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: true
userxattr: false
Logging Driver: json-file
Cgroup Driver: cgroupfs
Cgroup Version: 1
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 1c90a442489720eec95342e1789ee8a5e1b9536f
runc version: v1.1.4-0-g5fd4c4d
init version: de40ad0
Security Options:
seccomp
Profile: default
Kernel Version: 5.15.90.1-microsoft-standard-WSL2
Operating System: Docker Desktop
OSType: linux
Architecture: x86_64
CPUs: 24
Total Memory: 31.29GiB
Name: docker-desktop
ID: BO42:M6L2:NVXF:YIQB:TLON:RYN2:RD3L:J2HE:HRO4:56W7:HE2U:XRBR
Docker Root Dir: /var/lib/docker
Debug Mode: false
HTTP Proxy: http.docker.internal:3128
HTTPS Proxy: http.docker.internal:3128
No Proxy: hubproxy.docker.internal
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
hubproxy.docker.internal:5000
127.0.0.0/8
Live Restore Enabled: false

WARNING: No blkio throttle.read_bps_device support
WARNING: No blkio throttle.write_bps_device support
WARNING: No blkio throttle.read_iops_device support
WARNING: No blkio throttle.write_iops_device support

The envd version output

envd: v0.3.16
BuildDate: 2023-03-30T03:53:41Z
GitCommit: 04f43da
GitTreeState: clean
GitTag: v0.3.16
GoVersion: go1.19.7
Compiler: gc
Platform: linux/amd64

Additional context

No response