RFR: 8372801: tools/sincechecker/modules/java.base/JavaBaseCheckSince.java fails with JDK 27 [v2]

[Nizar Benalla]

> The test no longer needs to be problem listed now that the symbol information has caught up and is up to date.
> This PR has a dependency on https://github.com/openjdk/jdk/pull/28944, I want them integrate them in order.

Nizar Benalla has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28945/files
  - new: https://git.openjdk.org/jdk/pull/28945/files/cdf8e3e9..cdf8e3e9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28945&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28945&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28945.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28945/head:pull/28945

PR: https://git.openjdk.org/jdk/pull/28945