[jdk17] RFR: 8269830: SA's vm object vtable matching code sometimes matches on incorrect type

[Chris Plummer]

See the CR for details. This issue is causing a lot of failures related to some threads occasionally not being included in the jstack output, such as SteadyStateThread, Common-Cleaner, and "Signal Dispatcher". The bug caused SA to sometimes think a JavaThread object is actually an instance of the CompilerThread subclass, even though it is not. This results in jstack not including the thread in the output since it purposefully omits CompilerThreads.

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Commit messages:
 - Get rid of solaris support addressTypeIsEqualToType that was causing issues on other platforms

Changes: https://git.openjdk.java.net/jdk17/pull/206/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=206&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269830
  Stats: 69 lines in 1 file changed: 0 ins; 56 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/206.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/206/head:pull/206

PR: https://git.openjdk.java.net/jdk17/pull/206