[minor] shorten and standardize s3 bucket access point name

[faangbait]

Issue

Access point names have a character limit, and if we're passing a fairly complex bucket name to the role, the read-only access point will be created, whereas the read-write access point will fail.

Line 88 of this file creates a read-only access point with the name {{ aws_bucket_name }}-ro-access-point.

Best practice for the read-write version of this bucket's access point is {{ aws_bucket_name }}-rw-access-point.

Description

Shortens and standardizes the read-write access point name.

Test Results

No tests. Simple change.

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