Update pixi + GHA

[ppinchuk]

I think caching the pdev environment during rust CI might have been causing the _version.py file to get lost. Hopefully this PR addresses that issue for good. Only way to find out is to test with a few more PR's

Copilot Pull Request Overview

This PR updates the pixi package manager and related tooling versions across the project, along with dependency updates and workflow optimizations.

• Updates pixi from v0.50.2 to v0.59.0 and setup-pixi action from v0.9.2 to v0.9.3
• Bumps nrel-elm dependency from 0.0.33 to 0.0.34 and adds ipykernel to python-dev dependencies
• Optimizes CI workflows by removing unused environment references and adjusting cache-write behavior

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
pyproject.toml	Updates nrel-elm dependency version and adds ipykernel to python-dev feature
.github/workflows/update_pixi_lock.yaml	Updates pixi/setup-pixi versions, enhances update script, upgrades create-pull-request action to v7, and attempts to configure draft PR creation
.github/workflows/publish_to_pypi.yml	Updates pixi and setup-pixi action versions for consistency
.github/workflows/docs.yml	Updates pixi and setup-pixi action versions for consistency
.github/workflows/ci-rust.yml	Updates pixi/setup-pixi versions and removes unnecessary pdev environment references from rust-only jobs
.github/workflows/ci-python.yml	Updates pixi/setup-pixi versions and optimizes cache-write behavior by disabling it for certain jobs

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