RFR: 8343343: Misc crash dump improvements on more platforms after JDK-8294160

[Martin Doerr]

[JDK-8294160](https://bugs.openjdk.org/browse/JDK-8294160) has improved `os::print_tos_pc` for some platforms. This PR extends it to all platforms. I have moved it into shared code and made it generic.
In addition, `fetch_frame_from_context(const void* ucVoid)` checks the pc on all platforms, now. If it's bad, we use the caller PC instead.

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Commit messages:
 - 8343343: Misc crash dump improvements on more platforms after JDK-8294160

Changes: https://git.openjdk.org/jdk/pull/21809/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21809&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8343343
  Stats: 270 lines in 14 files changed: 57 ins; 208 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/21809.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21809/head:pull/21809

PR: https://git.openjdk.org/jdk/pull/21809