RFR: 8298277: Replace "session" with "scope" for FFM access [v2]

[Per Minborg]

On Thu, 8 Dec 2022 08:17:44 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> This PR suggests renaming various names from "session" to "scope" in accordance with https://openjdk.org/jeps/434
>> 
>> The PRs contains changes for several sub-components.
>
> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert renaming of MemorySessionImpl

I am going to close this PR in favor of several other smaller ones.

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PR: https://git.openjdk.org/jdk/pull/11573