RFR: 8339368: Switch targets are not inflated in CodeModel if no StackMap

[Adam Sotona]

ClassFile API use an alternate labels inflation method for class versions < 50 (where StackMapTable attribute is optional).
The alternate method missed label inflation of lookup switch and table switch instructions.
This patch fixes the label inflation method for for class versions < 50 and adds relevant test.

Please review.

Thanks,
Adam

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

Commit messages:
 - 8339368: Switch targets are not inflated in CodeModel if no StackMap

Changes: https://git.openjdk.org/jdk/pull/20810/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20810&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339368
  Stats: 61 lines in 2 files changed: 45 ins; 12 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/20810.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20810/head:pull/20810

PR: https://git.openjdk.org/jdk/pull/20810