Skip plugin loading for version output

[pratyushsinghal7]

Pull Request Check List

Resolves: #10625

• Added tests for changed code.
• Documentation is not required for this internal startup optimization.

Summary

Skip application plugin discovery when Poetry is invoked with the global --version or -V flag. Plugins cannot change Poetry's version output, and loading their entry points adds avoidable startup latency.

The check lives in _load_plugins() alongside the existing --no-plugins fast path. It uses Cleo's parameter boundary handling so version arguments forwarded to subprocesses, such as poetry run -- python -V, continue to load Poetry plugins normally.

Testing

• .venv/bin/pytest tests/console/test_application.py -q — 22 passed
• PATH="/tmp/poetry-test-bin:$PATH" .venv/bin/pytest tests/console -q — 958 passed, 6 skipped
• PATH="/tmp/poetry-test-bin:$PATH" .venv/bin/pytest -q — 3176 passed, 27 skipped
• .venv/bin/mypy — success across 374 source files
• .venv/bin/pre-commit run --files src/poetry/console/application.py tests/console/test_application.py — passed

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