RFR: 8278423: ExtendedDTraceProbes should be deprecated

[Emanuel Peter]

Deprecated ExtendedDTraceProbes.
Edited help messages and man pages accordingly.
Removed `/src/hotspot/share/services/dtraceAttacher.hpp`: only contained declarations that are never defined or used.

Checked that tests are not affected.

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Commit messages:
 - removed file with declarations that are never defined or used: /src/hotspot/share/services/dtraceAttacher.hpp
 - 8278423: ExtendedDTraceProbes should be deprecated

Changes: https://git.openjdk.java.net/jdk/pull/7110/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7110&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278423
  Stats: 61 lines in 8 files changed: 5 ins; 55 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7110.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7110/head:pull/7110

PR: https://git.openjdk.java.net/jdk/pull/7110