RFR: 8355515: Clarify the purpose of forcePass() and forceFail() methods [v3]

[Manukumar V S]

> Clarified the purpose of forcePass() and forceFail() methods and recommended usage of these methods.
> 
> forcePass() contained an incorrect sample; it's addressed by [JDK-8355441](https://bugs.openjdk.org/browse/JDK-8355441).
> 
> The description of forceFail() has been expanded, too.
> 
> 
> A new section in the description of the PassFailJFrame added to describe forcePass() and forceFail().

Manukumar V S has updated the pull request incrementally with one additional commit since the last revision:

  Review comments fixed : Forcibly wordings changed

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/25091/files
  - new: https://git.openjdk.org/jdk/pull/25091/files/9f0a6321..ff288f0e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25091&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25091&range=01-02

  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/25091.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25091/head:pull/25091

PR: https://git.openjdk.org/jdk/pull/25091