RFR: 8277372: Add getters for BOT and card table members [v7]

[Thomas Schatzl]

On Fri, 3 Dec 2021 13:52:02 GMT, Vishal Chand <duke at openjdk.java.net> wrote:

>> Changed the visibility, added getters and refactored the following:
>> 
>> 1. Card Table Members
>> 2. BOT members
>> 3. ObjectStartArray block members
>
> Vishal Chand has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Change to address @albertnetymk comment

Lgtm.

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Marked as reviewed by tschatzl (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6570