RFR: 8285739: disable EA when both JVMTI and Preview are enabled [v2]

[Leonid Mesnik]

> The fix disables EscapeBarrier and EscapeAnalysis when certain JVMTI capabilities are enabled and --enable-preview.
> 
> It restores the same behavior as it was before https://bugs.openjdk.java.net/browse/JDK-8227745 "Enable Escape Analysis for Better Performance in the Presence of JVMTI Agents" is implemented when Continuations are enabled.

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  2nd v

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8589/files
  - new: https://git.openjdk.java.net/jdk/pull/8589/files/3e0c6ee6..726e7dcc

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8589&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8589&range=00-01

  Stats: 14 lines in 3 files changed: 5 ins; 5 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8589.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8589/head:pull/8589

PR: https://git.openjdk.java.net/jdk/pull/8589