Adopt package manager command classes

[edvilme]

Summary

Adopts the package manager command classes introduced in #1621 across Pip/UV, Conda, and Poetry.

Changes

• Replaces existing command construction and execution paths with the new command classes.
• Preserves existing command flags, environment targeting, version ordering, prerelease defaults, timeouts, and Poetry cwd behavior.
• Removes superseded utility wrappers and obsolete tests tied to those utilities.
• Adds a parametrized package-manager roundtrip integration test (install → list → direct-deps → available-versions → uninstall) driven by the public API and grouped by managerId, so future managers are covered automatically. The available-versions step is capability-guarded so it runs when the API surfaces getPackageAvailableVersions and skips gracefully otherwise.

Relationship

• Targets main directly and depends only on the already-merged command classes (Introduce package manager command classes #1621). Independent of the smoke-tests PR Add package manager command smoke tests #1677.
• Replaces Adopt package manager command classes #1678, whose base branch could not be changed after GitHub registered it as part of a stack; the stack has been undone and this PR targets main.
• The command unit tests live in Add package manager command smoke tests #1677 (reworked to assert parsed values). They were removed from this branch to avoid duplicate/overlapping copies.

Testing

• npm run compile-tests
• npm run unittest (1,475 passing)
• Roundtrip integration test runs in the extension host via npm run integration-test.

[Copilot]

Pull request overview

This PR migrates Pip/UV, Conda, and Poetry package manager call sites to the newer package-manager command class layer (introduced in #1621), and removes older helper utilities/tests that those call sites depended on.

Changes:

• Replaces ad-hoc command construction/execution with concrete command classes for Pip/UV, Conda, and Poetry.
• Refactors Pip/Conda/Poetry package manager flows to use command objects (including progress + cancellation wiring).
• Removes superseded parsing/execution utilities and replaces related unit tests with command-focused tests.

Reviewed changes

Copilot reviewed 13 out of 14 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/test/managers/poetry/commands.unit.test.ts	Adds Poetry command smoke tests (currently mostly “does not reject”).
src/test/managers/conda/commands.unit.test.ts	Adds Conda command smoke tests (currently mostly “does not reject”).
src/test/managers/builtin/commands.unit.test.ts	Adds Pip/UV command smoke tests (currently mostly “does not reject”).
src/test/managers/builtin/pipVersions.unit.test.ts	Removes tests for the old pip-index-versions parsing helper.
src/test/managers/builtin/pipListUtils.unit.test.ts	Removes tests for the old pip list / uv tree parsing helpers.
src/managers/poetry/poetryPackageManager.ts	Switches Poetry package operations to command classes; refactors Poetry cwd selection into helper.
src/managers/conda/condaUtils.ts	Removes superseded managePackages() helper.
src/managers/conda/condaPackageManager.ts	Switches Conda package operations/list/version/available-versions to command classes.
src/managers/builtin/utils.ts	Adds parsePackageSpecs() helper and removes older pip-related utility functions from this module.
src/managers/builtin/pipUtils.ts	Switches installed-package enumeration to command classes; removes isPipInstallCommand().
src/managers/builtin/pipPackageManager.ts	Switches pip/uv operations to command classes; refactors available versions and direct-name listing.
src/managers/builtin/pipListUtils.ts	Deletes the old pip list / uv tree parsing module.
src/managers/builtin/helpers.ts	Adjusts logging behavior for python stderr output.
package-lock.json	Lockfile update (tslib metadata change).