[sdk] parameterize PipelineTask's methods: set_cpu_requests, set_env_variables, set_memory_limit, etc

[haiminh2001]

Environment

• KFP SDK version:
  2.8.0

Steps to reproduce

@pipeline(name='test_cpu_request'):
  def pipeline(cpu_request: str):

    task.set_cpu_request(cpu_request)

Error:

Traceback (most recent call last):
  File "pipeline.py", line 13, in <module>
    def pipeline(train_image_uri: str,
  File "/miniconda3/envs/dev-3-10/lib/python3.10/site-packages/kfp/dsl/pipeline_context.py", line 65, in pipeline
    return component_factory.create_graph_component_from_func(
  File "/miniconda3/envs/dev-3-10/lib/python3.10/site-packages/kfp/dsl/component_factory.py", line 673, in create_graph_component_from_func
    return graph_component.GraphComponent(
  File "/miniconda3/envs/dev-3-10/lib/python3.10/site-packages/kfp/dsl/graph_component.py", line 58, in __init__
    pipeline_outputs = pipeline_func(*args_list)
  File "pipeline.py", line 72, in pipeline
    .set_cpu_request(cpu_request)
  File "/miniconda3/envs/dev-3-10/lib/python3.10/site-packages/kfp/dsl/pipeline_task.py", line 56, in wrapper
    return method(self, *args, **kwargs)
  File "/miniconda3/envs/dev-3-10/lib/python3.10/site-packages/kfp/dsl/pipeline_task.py", line 362, in set_cpu_request
    cpu = self._validate_cpu_request_limit(cpu)
  File "/miniconda3/envs/dev-3-10/lib/python3.10/site-packages/kfp/dsl/pipeline_task.py", line 340, in _validate_cpu_request_limit
    if re.match(r'([0-9]*[.])?[0-9]+m?$', cpu) is None:
  File "/miniconda3/envs/dev-3-10/lib/python3.10/re.py", line 190, in match
    return _compile(pattern, flags).match(string)
TypeError: expected string or bytes-like object

Expected result

The method set_cpu_requests is expecting a hard-coded string, but I think the cpu requests should be an adjustable param that may vary among runs.

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