RFR: 8286473: Drop --enable-preview from Record related tests

[Aleksey Shipilev]

There are plenty of tests failing on many architectures due to `--enable-preview` VM code introduced by Loom. This improvements eliminates some of the redundant `--enable-preview` clauses from the Record tests, since Records have been graduated from preview in JDK 16. 

Additional testing:
 - [x] Linux x86_64 fastdebug, affected tests still pass
 - [x]  Linux x86_32 fastdebug, affected tests start to pass

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Commit messages:
 - Fix

Changes: https://git.openjdk.java.net/jdk/pull/8626/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8626&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8286473
  Stats: 28 lines in 3 files changed: 0 ins; 24 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8626.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8626/head:pull/8626

PR: https://git.openjdk.java.net/jdk/pull/8626