Bedrock: Add ability to get maxTokens limit via API call

[tim-finnigan]

Original issue: boto/boto3#4206 (ref: P141459514)

[tim-finnigan]

I've checked our internal system and discovered that the Bedrock team already has this on their radar. I've noted your support and specific use case in the existing request. If you have any more details you'd like us to share with them, let us know. Since this is being tracked by the Bedrock team, I'm closing this issue on our end. However, any changes they make to the API will be reflected in our SDKs. Going forward you can refer to the blog and CHANGELOG for updates.

[github-actions]

This issue is now closed.

Comments on closed issues are hard for our team to see.
If you need more assistance, please either tag a team member or open a new issue that references this one.
If you wish to keep having a conversation with other community members under this issue feel free to do so.