[ENH]: axes.labelcolor should use text.color by default

[AnsonTran]

PR summary

Closes #28155.

Implements the changes suggested in the issue:

• Adds support for rcParams["axes.labelcolor"] = auto which defaults to rcParams["text.color"]
• rcParams["x/ytick.labelcolor"] now accepts auto and defaults to rcParams["text.color"]. Same behavior for both inherit and auto
• rcParams["x/ytick.color"] now defaults to rcParams["axes.edgecolor"]

PR checklist

• "closes #0000" is in the body of the PR description to link the related issue
• [N/A] new and changed code is tested
• [N/A] Plotting related features are demonstrated in an example
• [N/A] New Features and API Changes are noted with a directive and release note
• [N/A] Documentation complies with general and docstring guidelines