RFR: 8325342: Remove unneeded exceptions in compare.sh [v2]

[Magnus Ihse Bursie]

> Over time, we have been better at addressing inconsistencies in the build, but the exceptions put in place in compare.sh have not been updated to reflect this.
> 
> This attempts to make sure we only keep those exceptions that are currently actually needed to verify a reproducible build (the primary usecase for the compare script these days).
> 
> I also discovered bugs in the script, where mismatches in a zip file did not make us report a failed comparison. I added extra code to make sure we always set the REGRESSION flag whenever we detect a problem.

Magnus Ihse Bursie has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 17 additional commits since the last revision:

 - Restore jar_contents exception
 - Do not compare .pdb files
 - Assume GraphViz non-determinism has been fixed in 9.0
 - Remove jar_contents exception
 - Test debug symbol files separately, for clarity
 - Merge branch 'master' into remove-compare-exceptions
 - Also fix windows debug files
 - Do not make debuginfo files executable
 - Add support for linux debug files
 - Separate out debug files
 - ... and 7 more: https://git.openjdk.org/jdk/compare/ea3a6757...2db17083

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/17735/files
  - new: https://git.openjdk.org/jdk/pull/17735/files/5a4efc40..2db17083

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17735&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17735&range=00-01

  Stats: 37386 lines in 1230 files changed: 16781 ins; 13112 del; 7493 mod
  Patch: https://git.openjdk.org/jdk/pull/17735.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17735/head:pull/17735

PR: https://git.openjdk.org/jdk/pull/17735