[SPARK-49097][INFRA] Add Python3 environment detection for the `build_error_docs` method in `build_api_decs.rb`

### What changes were proposed in this pull request?

This PR aims to add Python3 environment detection for the `build_orror_docs` method in `build_api_decs.rb`.

### Why are the changes needed?

Make the environment exception prompts more friendly for developers when generating documents.
Before:
<img width="1322" alt="image" src="https://github.com/user-attachments/assets/9f31c951-e63a-479a-9600-2b62e8ad9ddd">
After:
<img width="1379" alt="image" src="https://github.com/user-attachments/assets/b0841f42-237a-429e-8673-5254328c6dd2">

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Pass GA.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #47590 from wayneguow/inf.

Authored-by: Wei Guo <guow93@gmail.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>