RFR: 8365501: Remove speical AdapterHandlerEntry for abstract methods [v3]

[Ashutosh Mehra]

> This PR removes the need for having AdapterHandlerEntry for abstract methods. The check for abstract method is now done in the accessor functions in Method such as Method::get_i2c_entry().
> Motivation for this change is described in the JBS issue.

Ashutosh Mehra has updated the pull request incrementally with one additional commit since the last revision:

  Address review comment - swap conditions
  
  Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26764/files
  - new: https://git.openjdk.org/jdk/pull/26764/files/cd8b85f4..eb641188

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26764&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26764&range=01-02

  Stats: 5 lines in 1 file changed: 2 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26764.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26764/head:pull/26764

PR: https://git.openjdk.org/jdk/pull/26764