Add pipeline states to ir

[mylibrar]

This PR fixes #498 .

Description of changes

• BaseProcessor
  • Remove the "selector" key in default_configs().
• Pipeline
  • Add a new entry "PIPELINE_STATES" in IR to serialized the current state of pipeline.
    • _initialized
    • _enable_profiling
    • _check_type_consistency
    • _do_init_type_check
    • resource.onto_specs_dict
    • resource.merged_entry_tree

Possible influences of this PR.

Describe what are the possible side-effects of the code change.

Test Conducted

remote_processor_test.py is updated to check whether a pipeline can correctly update its states based on IR.

[codecov]

Codecov Report

Merging #499 (7299fd6) into master (8ee2c6c) will increase coverage by 0.13%.
The diff coverage is 94.38%.

@@            Coverage Diff             @@
##           master     #499      +/-   ##
==========================================
+ Coverage   79.22%   79.35%   +0.13%     
==========================================
  Files         220      220              
  Lines       15574    15718     +144     
==========================================
+ Hits        12338    12473     +135     
- Misses       3236     3245       +9     

Impacted Files	Coverage Δ
forte/pipeline.py	93.53% <86.36%> (-0.93%)	⬇️
forte/data/selector.py	88.15% <90.90%> (-0.74%)	⬇️
forte/data/ontology/code_generation_objects.py	93.02% <92.85%> (-0.01%)	⬇️
forte/version.py	100.00% <100.00%> (ø)
tests/forte/advanced_pipeline_test.py	99.20% <100.00%> (ø)
tests/forte/data/selector_test.py	98.38% <100.00%> (+1.01%)	⬆️
tests/forte/pipeline_test.py	97.77% <100.00%> (ø)
forte/data/data_pack.py	77.82% <0.00%> (+0.19%)	⬆️

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[hunterhector]

Overall looks good to me. There are a few comments to fix.

But for the problem on selector serialization, we may need to have a better solution. The selectors are currently very flexible but hard to serialize, an alternative is to restrict its interface (for example, use HParam/Config and remove all init kwargs). This may require another PR. Let's fix the rest of the comments and keep this PR on hold.

[hunterhector]

Probably also see if we can fix the pipeline format here?

https:/asyml/forte-wrappers/blob/ac2d3715a4b86db44c025ef9155a63a1b979cf28/examples/gpt2/sample_multipack_pipeline_gpt.yml

[mylibrar]

Blocked by #503

[hunterhector]

I think these all look good now.