BUG: fix inspect usage when pyarrow or jinja2 is not installed #20015

Job	Run time
Pyodide build	2m 22s
Linux-32-bit	2m 11s
Linux-Musl	2m 9s
python-freethreading	2m 23s
python-dev (macOS-13)	2m 27s
python-dev (macOS-14)	2m 24s
python-dev (ubuntu-22.04)	2m 22s
python-dev (windows-latest)	2m 15s
macos-13 actions-310.yaml	2m 27s
macos-13 actions-311.yaml	2m 30s
macos-13 actions-312.yaml	2m 28s
macos-14 actions-310.yaml	2m 19s
macos-14 actions-311.yaml	2m 13s
macos-14 actions-312.yaml	2m 22s
windows-latest actions-311.yaml	2m 6s
windows-latest actions-312.yaml	2m 5s
windows-latest actions-310.yaml	2m 7s
Minimum Versions	2m 23s
ubuntu-latest actions-310.yaml	2m 22s
ubuntu-latest actions-311.yaml	2m 22s
Future infer strings (without pyarrow)	2m 23s
Locale: zh_CN	2m 24s
Locale: it_IT	2m 22s
Downstream Compat	2m 24s
Numpy Dev	2m 20s
Pyarrow Nightly	2m 23s
ubuntu-latest actions-312.yaml	2m 21s
Future infer strings	2m 24s
Pypy	1m 16s
	1h 6m 34s

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