[jdk21u-dev] RFR: 8303920: Avoid calling out to python in DataDescriptorSignatureMissing test [v2]

[Daniel Hu]

> Backport of improvements to DataDescriptorSignatureMissing test. Unclean for this [trivial issue fix in 22](https://github.com/openjdk/jdk/commit/34653c1e73452c0e07beb1f5e2eb8029fdb3befc) that adds a bug-id for `@ignore`. Otherwise, it's a clean backport.
> 
> Passes tier1 tests and the test itself on Linux x64

Daniel Hu has updated the pull request incrementally with one additional commit since the last revision:

  reverted copyright year to original

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

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/913/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/913/files/50688ba4..0d4c3d20

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=913&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=913&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/913.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/913/head:pull/913

PR: https://git.openjdk.org/jdk21u-dev/pull/913