[crac] RFR: 8348674: [CRaC] Check whether CRaCRestoreFrom does exist

[Timofei Pushkin]

Adds a check for `CRaCRestoreFrom` existence and type correctness into the JVM itself

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

Commit messages:
 - Check whether CRaCRestoreFrom does exist

Changes: https://git.openjdk.org/crac/pull/192/files
  Webrev: https://webrevs.openjdk.org/?repo=crac&pr=192&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8348674
  Stats: 11 lines in 1 file changed: 11 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/crac/pull/192.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/192/head:pull/192

PR: https://git.openjdk.org/crac/pull/192