Tpot affects the nb of jobs at import

Hi,

when importing tpot on my linux machine the nb of effective joblib jobs is reduced to 1
the issue is not happening on the windows machine

## Process to reproduce the issue
```
import sys
import platform
print({
"python_version": platform.python_version(),
"python_implementation": platform.python_implementation(),
"platform": platform.platform(),
"system": platform.system(),
"architecture": platform.architecture(),
"processor": platform.processor(),
})
import joblib
print('joblib.__version__', joblib.__version__)
from joblib import effective_n_jobs
print('step1 logic_processors n_jobs = ', effective_n_jobs(n_jobs=-1))
import tpot
print('tpot.__version__', tpot.__version__)
print('step2 logic_processors n_jobs = ', effective_n_jobs(n_jobs=-1))
assert effective_n_jobs(n_jobs=-1) > 1

```
## Expected result

output on windows machine (no problem):

```
{'python_version': '3.11.4', 'python_implementation': 'CPython', 'platform': 'Windows-10-10.0.19045-SP0', 'system': 'Windows', 'architecture': ('64bit', 'WindowsPE'), 'processor': 'Intel64 Family 6 Model 140 Stepping 1, GenuineIntel'}
joblib.__version__ 1.3.2
step1 logic_processors n_jobs = 8
tpot.__version__ 0.12.2
step2 logic_processors n_jobs = 8
```
## Current result
output on linux machine:
```
{'python_version': '3.11.5', 'python_implementation': 'CPython', 'platform': 'Linux-4.12.14-197.108-default-x86_64-with-glibc2.26', 'system': 'Linux', 'architecture': ('64bit', 'ELF'), 'processor': 'x86_64'}
joblib.__version__ 1.3.2
step1 logic_processors n_jobs = 56
tpot.__version__ 0.12.2
step2 logic_processors n_jobs = 1
Traceback (most recent call last):
File "/dss/dsshome1/0E/di35cex/shapley-data-interaction/bug.py", line 18, in
assert effective_n_jobs(n_jobs=-1) > 1
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError
```
## Possible fix
no idea