RFR: 8333117: Remove support of remote and manual debuggee launchers

[Chris Plummer]

[JDK-8333117](https://bugs.openjdk.org/browse/JDK-8333117) removed support for non-local debuggees, so now only local debuggees are supported. However, there are now a lot of references to the "local" debuggee mode which are not necessary because "local" is implied. These references are in comments and API names and should be removed.

Also, after [JDK-8333117](https://bugs.openjdk.org/browse/JDK-8333117), DebugeeProcess no longer needs to be considered abstract. It has no abstract methods.

Tested nsk/jdi, nsk/jdb, and nsk/jdwp locally. Will run tier5 CI to get better coverage.

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Commit messages:
 - Get rid of references to "local" debuggee since it is alays local.

Changes: https://git.openjdk.org/jdk/pull/25887/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25887&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333117
  Stats: 103 lines in 18 files changed: 0 ins; 15 del; 88 mod
  Patch: https://git.openjdk.org/jdk/pull/25887.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25887/head:pull/25887

PR: https://git.openjdk.org/jdk/pull/25887