Add username-based Docker image tagging to prevent multi-user conflicts

[Copilot]

When multiple users build Presto images on shared systems, they overwrite each other's images due to hardcoded :latest tags on all coordinator, worker, and dependency images.

Changes

Default tag resolution:

• Images now tagged with ${USER:-latest} by default
• Applied to: presto-coordinator, presto-native-worker-{cpu,gpu}, presto-java-worker, and presto/prestissimo-dependency:centos9

CLI interface:

• Added --tag option to start_*_presto.sh, build_centos_deps_image.sh, and fetch_centos_deps_image.sh
• Existing --image-name in build script takes precedence over --tag for full control

Build integration:

• native_build.dockerfile: Accepts IMAGE_TAG build arg for base image selection
• docker-compose.common.yml: Passes IMAGE_TAG to native worker builds
• Dependency image reference updated: presto/prestissimo-dependency:centos9-${IMAGE_TAG}

Example

# Default: uses $USER
./build_centos_deps_image.sh  # → presto/prestissimo-dependency:centos9-alice
./start_native_gpu_presto.sh  # → presto-native-worker-gpu:alice

# Override
./start_native_gpu_presto.sh --tag experiment-1  # → presto-native-worker-gpu:experiment-1

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add Username to TAG for docker images</issue_title>
<issue_description>When many people are working on same systems with Presto, and they try to run and build Presto images, it ends up replacing images

presto-native-worker-cpu:latest
presto-native-worker-gpu:latest
presto-coordinator:latest

It's because they all share same name and tag.
So, make sure to add username to the TAG so that other users don't replace latest images.

</issue_description>

<agent_instructions>make sure in include username as default tag to all docker images built.
Expose --tag option as CLI argument too, with default value as username.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@karthikeyann Reopening issue, because This issue is present in https://github.com/rapidsai/velox-testing/blob/main/presto/scripts/build_centos_deps_image.sh and their usage of presto/prestissimo-dependency:centos9 in other scripts as well. Also, please check if this dependency is use for building all presto-native-worker-cpu:latest presto-native-worker-gpu:latest presto-coordinator:latest @GregoryKimball Thank you @karthikeyann for reopening this. I would like to streamline the process for running quick Presto benchmarks based on GPU images.

• Fixes Add Username to TAG for docker images #163

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