[jdk8u] RFR: 8339644: Improve parsing of Day/Month in tzdata rules

[Dmitry Cherepanov]

The backport is a prerequisite for timezone data update to 2024b. Targeting the PR to jdk8u repo (January release).

The change doesn’t apply cleanly. In JDK9, JDK-8042369 rewrote the builder classes but it’s too large to backport to 8u so I adopted 11u backport for 8u codebase. The test change applies cleanly after path reshuffling except copyright year.

Testing: jtreg tests (java/text/Format java/util/TimeZone sun/util/calendar sun/util/resources). Sanity checked that tzdata-2024b (rearguard version) fails to build (“Unknown month: April”) without the changes and builds with the changes. 

Thanks.

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Commit messages:
 - Backport 86a2f9c7dcb6585cabf03c0940511d11560e85b7

Changes: https://git.openjdk.org/jdk8u/pull/64/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u&pr=64&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339644
  Stats: 88 lines in 3 files changed: 32 ins; 28 del; 28 mod
  Patch: https://git.openjdk.org/jdk8u/pull/64.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u.git pull/64/head:pull/64

PR: https://git.openjdk.org/jdk8u/pull/64