refactor: replace interface{} with any for clarity and modernization

[bigmoonbit]

Closes #???

Description

This change replaces occurrences of interface{} with the predeclared identifier any, introduced in Go 1.18 as an alias for interface{}.

As noted in the Go 1.18 Release Notes:
This improves readability and aligns the codebase with modern Go conventions.

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For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[bigmoonbit]

@jribbink @chasefleming Hi, Could you please review this PR at your convenience? Thank you very much.