RFR: 8319242: HotSpot Style Guide should discourage non-local variables with non-trivial initialization or destruction

[Kim Barrett]

Please review this change to the HotSpot Style Guide to add discussion of how
we prefer to handle initialization and destruction of non-local variables.

I propose this is an editorial change, as it just documents current practice
rather than suggesting a change to current practice. As such, the normal
HotSpot PR process applies.

The updated .html file was generated using make update-build-docs.

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Commit messages:
 - static variable inits

Changes: https://git.openjdk.org/jdk/pull/25812/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25812&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319242
  Stats: 39 lines in 2 files changed: 39 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/25812.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25812/head:pull/25812

PR: https://git.openjdk.org/jdk/pull/25812