RFR: 8343039: Remove jdk.internal.misc.InternalLock and usages from java.io [v7]

[Alan Bateman]

On Wed, 13 Nov 2024 21:39:54 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Uses of `InternalLock` are removed and `synchronized` is reinstated.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8343039: Remove failing getDeclaredField call from test java/lang/ProcessBuilder/Basic.java

I did another pass over this and don't see any issues except the confusing comment in the BOS constructor.  Overall good cleanup as InternalLock was a temporary crutch to avoid pinning in the java.io area for common usages.

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Marked as reviewed by alanb (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/22048#pullrequestreview-2435909813