🚑 [HotFix] Fix dev environment for CPU Docker

[yhna940]

What does this PR do?

This PR fixes the development environment setup for the CPU Docker configuration.

• Removed useradd and USER user lines from Dockerfile to avoid permission issues with non-root user configuration.
• Updated onCreateCommand in .devcontainer/devcontainer.json to include make installation, resolving dependency issues during setup.
• Ensured necessary packages are installed with root privileges for a smoother development experience.

Motivation:

Currently, attempting to build the dev container with the CPU Docker image leads to permission errors during onCreateCommand, such as:

[433685 ms] Start: Run in container: /bin/sh -c apt-get update && apt-get install -y git && pip install -e '.[dev]'
Reading package lists... Done
E: List directory /var/lib/apt/lists/partial is missing. - Acquire (13: Permission denied)
[433789 ms] onCreateCommand failed with exit code 100. Skipping any further user-provided commands.
[433269 ms] Error: Command failed: /bin/sh -c apt-get update && apt-get install -y git && pip install -e '.[dev]'
[433269 ms]     at G7 (/root/.vscode-remote-containers/dist/dev-containers-cli-0.388.0/dist/spec-node/devContainersSpecCLI.js:235:130)
[433269 ms]     at async tm (/root/.vscode-remote-containers/dist/dev-containers-cli-0.388.0/dist/spec-node/devContainersSpecCLI.js:227:4483)
[433269 ms]     at async $w (/root/.vscode-remote-containers/dist/dev-containers-cli-0.388.0/dist/spec-node/devContainersSpecCLI.js:227:3828)
[433269 ms]     at async em (/root/.vscode-remote-containers/dist/dev-containers-cli-0.388.0/dist/spec-node/devContainersSpecCLI.js:227:2835)
[433269 ms]     at async GrA (/root/.vscode-remote-containers/dist/dev-containers-cli-0.388.0/dist/spec-node/devContainersSpecCLI.js:666:2752)
[433269 ms]     at async LrA (/root/.vscode-remote-containers/dist/dev-containers-cli-0.388.0/dist/spec-node/devContainersSpecCLI.js:665:8554)
[433269 ms]     at async /root/.vscode-remote-containers/dist/dev-containers-cli-0.388.0/dist/spec-node/devContainersSpecCLI.js:482:1190
[433273 ms] Exit code 1

This error occurs because onCreateCommand tries to update and install packages without sufficient permissions. By removing the non-root user setup, this PR ensures that the setup process completes without errors, providing a stable development environment.