feat: async semantic splitter noder parser

[mjrowsky]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # allows using embed_model async methods when parsing nodes

New Package?

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• Yes
• No

Version Bump?

Did I bump the version in the pyproject.toml file of the package I am updating? (Except for the llama-index-core package)

• Yes
• No

Type of Change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

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• I added new unit tests to cover this change
• I believe this change is already covered by existing unit tests

Suggested Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added Google Colab support for the newly added notebooks.
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I ran make format; make lint to appease the lint gods

[logan-markewich]

This is a great start! We could make this event faster too, but maybe another PR

For example, we can run multiple nodes at once behind a semaphore to limit concurrency

from llama_index.core.async_utils import run_jobs
...
jobs = []
for node in nodes_with_progress:
    jobs.append(self.abuild_semantic_nodes_from_documents([node], False))
results = await run_jobs(jobs, workers=4, show_progress=show_progress)

[logan-markewich]

the unit test failure seemed unrelated imo