gpt-sovits: Support air gapped environment

[lianhao]

Description

gpt-sovits: Support air gapped environment

Issues

Fixes #1482

Type of change

List the type of change like below. Please delete options that are not relevant.

• New feature (non-breaking change which adds new functionality)

Dependencies

List the newly introduced 3rd party dependency if exists.

Tests

Describe the tests that you ran to verify your changes.

[eero-t]

Approved, but why offline mode needs additional averaged_perceptron_tagger?

[lianhao]

Approved, but why offline mode needs additional averaged_perceptron_tagger?

Because that nltk data is missing from day 1 and is exposed during my offline mode testing

[eero-t]

Approved, but why offline mode needs additional averaged_perceptron_tagger?

Because that nltk data is missing from day 1 and is exposed during my offline mode testing

So this also fixes non-offline gpt-sovits bug? If yes, please note that also in the ticket description (maybe also commit description).

[lianhao]

Approved, but why offline mode needs additional averaged_perceptron_tagger?

Because that nltk data is missing from day 1 and is exposed during my offline mode testing

So this also fixes non-offline gpt-sovits bug? If yes, please note that also in the ticket description (maybe also commit description).

This is not a bug for non-offline case. Because the missing nltk data will be automatically downloaded.