RFR: 8322757: Enable -Wparentheses warnings

[Kim Barrett]

Please review this change to enable -Wparentheses when building HotSpot. That
warning is enabled by -Wall (which we use). That was overridden by explicitly
disabling it, because there were a number of places in HotSpot code that
triggered such warnings. Those places have all been fixed. In some cases that
made the code perhaps a little easier to read. There were also a few bugs
found and fixed by that effort. (So -Wparentheses has found existing bugs, and
may prevent future bugs.)

Testing: mach5 tier1 and GHA sanity checks, to provide build coverage for
Oracle-supported platforms and community-supported platforms.

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Commit messages:
 - remove disable of -Wparentheses

Changes: https://git.openjdk.org/jdk/pull/17335/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17335&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8322757
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17335.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17335/head:pull/17335

PR: https://git.openjdk.org/jdk/pull/17335