revert: "chore: bumping otlp deps to 1.15"

[bojiang]

Reverts #3351
It breaks the monitoring features.

Traceback (most recent call last):                                                                                                                                                                                             
File "/home/agent/BentoML/src/bentoml/_internal/server/http_app.py", line 324, in api_func                                                                                                                                      
output = await api.func(input_data)                                                                                                                                                                                         
File "/home/agent/BentoML/examples/monitoring/task_classification/service.py", line 18, in classify                                                                                                                             
with bentoml.monitor("iris_classifier_prediction") as mon:                                                                                                                                                                  
File "/home/agent/.conda/envs/torch@py3.7/lib/python3.7/contextlib.py", line 112, in __enter__                                                                                                                                  
return next(self.gen)                                                                                                                                                                                                       
File "/home/agent/BentoML/src/bentoml/_internal/monitoring/api.py", line 307, in monitor                                                                                                                                        
from .otlp import OTLPMonitor                                                                                                                                                                                               
File "/home/agent/BentoML/src/bentoml/_internal/monitoring/otlp.py", line 14, in <module>                                                                                                                                       
from opentelemetry.sdk._logs import set_logger_provider                                                                                                                                                                   
ImportError: cannot import name 'set_logger_provider' from 'opentelemetry.sdk._logs' 
(/home/agent/.conda/envs/torch@py3.7/lib/python3.7/site-packages/opentelemetry/sdk/_logs/__init__.py)

[codecov]

Codecov Report

Merging #3553 (3451f4c) into main (cdba3bc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #3553   +/-   ##
=======================================
  Coverage   31.62%   31.62%           
=======================================
  Files         138      138           
  Lines       11287    11287           
  Branches     1865     1865           
=======================================
  Hits         3570     3570           
  Misses       7471     7471           
  Partials      246      246           

[aarnphm]

oh got it. I guess I didn't test the monitoring change 😢