RFR (XS): 8196450: Deprecate JDWP/JDI canUnrestrictedlyRedefineClasses to match JVM TI capabilities

[serguei.spit...@oracle.com]

Please, review a fix for:
  https://bugs.openjdk.java.net/browse/JDK-8196450


CSR draft (one CSR reviewer is needed before finalizing it):
  https://bugs.openjdk.java.net/browse/JDK-8246540


Webrev:
  http://cr.openjdk.java.net/~sspitsyn/webrevs/2020/jdwp-depr.1/src/


Updated JDWP VirtualMachine::capabilitiesNew spec:
  http://cr.openjdk.java.net/~sspitsyn/webrevs/2020/jdwp-depr.1/docs/specs/jdwp/jdwp-protocol.html#JDWP_VirtualMachine_CapabilitiesNew

Updated JDI com.sun.jdi.VirtualMachine spec:
  http://cr.openjdk.java.net/~sspitsyn/webrevs/2020/jdwp-depr.1/docs/api/jdk.jdi/com/sun/jdi/VirtualMachine.html#canAddMethod()
  http://cr.openjdk.java.net/~sspitsyn/webrevs/2020/jdwp-depr.1/docs/api/jdk.jdi/com/sun/jdi/VirtualMachine.html#canUnrestrictedlyRedefineClasses()


Summary:
  The fix adds annotations and deprecation comments to the capabilities
   canUnrestrictedlyRedefineClasses and canAddMethod.
   It impacts the JDWP capabilitiesNew command and the JDI VirtualMachine interface.


Testing:
  Built docs and checked the doc has been generated as expected.
  Will run the JDI/JDWP tests locally

Thanks,
Serguei