[jdk17u-dev] RFR: 8289401: Add dump output to TestRawRSACipher.java

[Goetz Lindenmaier]

I backport this for parity with 17.0.12-oracle.

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Commit messages:
 - Backport 7b3bf97760c8daf6c03aaa069660f5a3a3873f8c

Changes: https://git.openjdk.org/jdk17u-dev/pull/2296/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2296&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8289401
  Stats: 9 lines in 1 file changed: 7 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2296.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2296/head:pull/2296

PR: https://git.openjdk.org/jdk17u-dev/pull/2296