RFR: 8370368: Apply java.io.Serial annotations in java.security.jgss [v3]

[Sergey Bylokhov]

> Please review the application of the `@Serial` annotation ([JDK-8202385](https://bugs.openjdk.org/browse/JDK-8202385)) to types in the java.security.jgss module to enable stricter compile-time checking of serialization-related declarations.
> 
> Example of a similar change https://github.com/openjdk/jdk/pull/24891.

Sergey Bylokhov has updated the pull request incrementally with one additional commit since the last revision:

  Replace java.io.Serial annotations with @Serial

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27925/files
  - new: https://git.openjdk.org/jdk/pull/27925/files/a410e847..89b4abe2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27925&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27925&range=01-02

  Stats: 5 lines in 4 files changed: 1 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/27925.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27925/head:pull/27925

PR: https://git.openjdk.org/jdk/pull/27925