[v5.8] Artifact add optimization on macOS and Windows

[Honny1]

This PR adds a new local artifact add API endpoint and enforces absolute path requirements for local file operations.

Fixes: https://issues.redhat.com/browse/RUN-3385
Fixes: #26321

Benchmark

• Command: podman artifact add quay.io/myartifact/benchmark:latest ./artifacts/random-file
• Artifacts Dir content:

$ du -a -h | sort -hr
5G	.
5.0G ./random-file

Benchmark Results:

Mac OS

• Number of runs: 10
• Machine:
  • Chip: Apple M3 Pro
  • RAM: 36 GB
  • SSD: 1 TB Apple SSD
• Podman machine configuration:
  • CPUs: 8
  • Memory: 8.1 GB
• report

Providers

applehv

• Before: 32.82 s
• After: 5.77 s

libkrun (krunkit 0.2.1)

• Before: 25.87 s
• After: 7.17 s

Windows

• Windows 10
• Number of runs: 10
• Machine:
  • CPU: Intel Core i7-8665U
  • RAM: 32 GB
  • SSD: 500 GB Samsung 970 Evo Plus
• Podman machine configuration:
  • CPUs: 8
  • Memory: 2 GB (WSL) | 8.2 GB (Hyper-v)
• report

Providers

WSL

• Memory: 2 GB
• Before: 35.25 s
• After: 78.31 s

Hyper-V

• Memory: 8.2 GB
• Before: 362.70 s
• After: 51.66 s

Checklist

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  the sign-off email address. See CONTRIBUTING.md
  for more information.
• Referenced issues using Fixes: #00000 in commit message (if applicable)
• Tests have been added/updated (or no tests are needed)
• Documentation has been updated (or no documentation changes are needed)
• All commits pass make validatepr (format/lint checks)
• Release note entered in the section below (or None if no user-facing changes)

Does this PR introduce a user-facing change?

Added new local artifact add API endpoint (`libpod/local/artifacts/add`) for loading artifacts from local files
Image and artifact load endpoints now require absolute paths for local file operations to improve security and prevent path ambiguity