refactor!: Sentence Transformers Embedders - new devices mgmt

[anakin87]

Related Issues

• part of Migrate remaining components to the new Device management #7000

Proposed Changes:

• I refactored the Embedders according to the new management of devices.
• no need to change the (Sentence Transformers) backend.

How did you test it?

CI, new tests

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[coveralls]

Pull Request Test Coverage Report for Build 7958080453

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.08%) to 89.303%

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Files with Coverage Reduction	New Missed Lines	%
components/embedders/sentence_transformers_document_embedder.py	2	95.56%
components/embedders/sentence_transformers_text_embedder.py	2	94.59%

Totals
Change from base Build 7957045453:	0.08%
Covered Lines:	4984
Relevant Lines:	5581

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💛 - Coveralls

[vblagoje]

LGTM 🚢