RFR: 8337662: Improve os::print_hex_dump for printing Instructions sections [v7]

[Matthias Baesken]

> Currently we use os::print_hex_dump for printing Instruction sections in the hserr file. The function could be slightly improved, .e.g. by showing directly the pc .
> The instructions section would for example look like this, with a small helper '=>' pointing to the pc. Makes the output more readable.

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  add suggestions from Thomas Stuefe, test unit size 2

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20419/files
  - new: https://git.openjdk.org/jdk/pull/20419/files/91eec57a..939e6da0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20419&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20419&range=05-06

  Stats: 12 lines in 2 files changed: 6 ins; 5 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20419.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20419/head:pull/20419

PR: https://git.openjdk.org/jdk/pull/20419