Add module name parameter for workflows and tasks

[YmirKhang]

TL;DR

This PR adds an optional parameter to workflow and task types to make the module name explicitly available.

@task(
    cache_version="1",
    container_image="{{.images.default.fqn}}:{{.images.default.version}}",
    module_name="<app.workflows.workflow_file>",
)
def my_task() -> None:
...

...
@workflow(module_name="<app.workflows.workflow_file>")
def my_workflow() -> None:

So that it can be avoided that the workflows and tasks default to __main__.my_task and __main__.my_workflow, by overriding module name in tasks and workflows

Type

• Bug Fix
• Feature
• Plugin

Are all requirements met?

• Code completed
• Smoke tested
• Unit tests added
• Code documentation added
• Any pending items have an associated Issue

Complete description

Added extra optional parameter module_name to workflow and task definitions.

Tracking Issue

flyteorg/flyte#1813

Follow-up issue

NA

[YmirKhang]

This is just an implementation to make it work with a self contained file. This was not tested, also other side effects are not considered. But since the parameter is optional it should be backward compatible.

[codecov]

Codecov Report

Merging #745 (97b0e29) into master (e6b8610) will increase coverage by 0.03%.
The diff coverage is 92.30%.

❗ Current head 97b0e29 differs from pull request most recent head 10bc3c7. Consider uploading reports for the commit 10bc3c7 to get more accurate results

@@            Coverage Diff             @@
##           master     #745      +/-   ##
==========================================
+ Coverage   85.60%   85.63%   +0.03%     
==========================================
  Files         342      342              
  Lines       28926    28989      +63     
  Branches     2381     2378       -3     
==========================================
+ Hits        24763    24826      +63     
- Misses       3530     3531       +1     
+ Partials      633      632       -1     

Impacted Files	Coverage Δ
flytekit/core/task.py	80.48% <ø> (ø)
flytekit/core/python_function_task.py	84.25% <75.00%> (-0.36%)	⬇️
flytekit/core/workflow.py	89.18% <80.00%> (-0.18%)	⬇️
...ts/flytekit/unit/core/test_python_function_task.py	92.00% <83.33%> (-1.66%)	⬇️
tests/flytekit/unit/remote/test_remote.py	99.02% <96.29%> (-0.98%)	⬇️
flytekit/core/tracker.py	82.08% <100.00%> (-0.99%)	⬇️
flytekit/types/file/file.py	90.44% <0.00%> (-0.41%)	⬇️
tests/flytekit/unit/core/test_type_engine.py	99.71% <0.00%> (ø)
flytekit/remote/remote.py	70.81% <0.00%> (+0.67%)	⬆️
... and 1 more

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