only set JULIA_DEBUG=PythonCall when running with debug logging enabled

[cjdoris]

No description provided.

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	449a9ba...	main / 449a9ba...
basic/@py/pydict/init	0.259 ± 0.056 ms	0.259 ± 0.059 ms	1 ± 0.32
basic/@py/pydict/pydel	0.258 ± 0.027 ms	0.258 ± 0.028 ms	1 ± 0.15
basic/julia/pydict/init	0.234 ± 0.074 ms	0.235 ± 0.07 ms	0.995 ± 0.43
basic/julia/pydict/pydel	0.238 ± 0.05 ms	0.236 ± 0.039 ms	1.01 ± 0.27
gc/full	0.648 ± 0.0037 s	0.641 ± 0.0057 s	1.01 ± 0.011
time_to_load	2.18 ± 0.039 s	2.15 ± 0.057 s	1.01 ± 0.032

Memory benchmarks

	main	449a9ba...	main / 449a9ba...
basic/@py/pydict/init	5.01 k allocs: 0.0764 MB	5.01 k allocs: 0.0764 MB	1
basic/@py/pydict/pydel	5.01 k allocs: 0.0764 MB	5.01 k allocs: 0.0764 MB	1
basic/julia/pydict/init	4.01 k allocs: 0.0612 MB	4.01 k allocs: 0.0612 MB	1
basic/julia/pydict/pydel	4.01 k allocs: 0.0612 MB	4.01 k allocs: 0.0612 MB	1
gc/full	0 allocs: 0 B	0 allocs: 0 B
time_to_load	0.143 k allocs: 10.6 kB	0.143 k allocs: 10.6 kB	1