[Bug]: BedrockEmbedding Async Methods Are Obviously Not Async

[brycecf]

Bug Description

BedrockEmbedding._aget_query_embedding & _aget_text_embedding both just use the standard synchronous function.

This should have at least been marked as "Not Implemented".

Version

0.3.0 (the integration version)

Steps to Reproduce

See source code.

Relevant Logs/Tracbacks

No response