RFR: 8351969: Add Public Identifiers to the JDK built-in Catalog [v3]

[Joe Wang]

> Add public identifiers to the JDK built-in Catalog; Replace the incorrect Schema 1.1 DTD files (note the Public Identifier at line 2) with the correct Schema 1.0 DTDs. The JDK built-in Catalog contains Schema 1.0 files only.
> 
> DTD files: the Schema 1.1 files, XMLSchema.dtd and datatypes.dtd, were removed and replaced with those of Schema 1.0. These files were downloaded from w3.org without modification. The file names were unfortunately the same, which (with the Diffs) made it look like they were modified though they were not.

Joe Wang has updated the pull request incrementally with one additional commit since the last revision:

  replace JDK Catalog in the java.xml module with public API

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24039/files
  - new: https://git.openjdk.org/jdk/pull/24039/files/4482d590..0b5a1cc4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24039&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24039&range=01-02

  Stats: 18 lines in 1 file changed: 2 ins; 6 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/24039.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24039/head:pull/24039

PR: https://git.openjdk.org/jdk/pull/24039