Update Unicode support to Unicode version 15.0.0 (bug#57846)

Update Unicode support to Unicode version 15.0.0 (bug#57846)

* admin/unidata/BidiBrackets.txt
* admin/unidata/BidiMirroring.txt
* admin/unidata/Blocks.txt
* admin/unidata/IVD_Sequences.txt
* admin/unidata/IdnaMappingTable.txt
* admin/unidata/NormalizationTest.txt
* admin/unidata/PropertyValueAliases.txt
* admin/unidata/ScriptExtensions.txt
* admin/unidata/Scripts.txt
* admin/unidata/SpecialCasing.txt
* admin/unidata/UnicodeData.txt
* admin/unidata/confusables.txt
* admin/unidata/copyright.html
* admin/unidata/emoji-data.txt
* admin/unidata/emoji-sequences.txt
* admin/unidata/emoji-test.txt
* admin/unidata/emoji-zwj-sequences.txt
* test/manual/BidiCharacterTest.txt: Updated files from Unicode
15.0.

* admin/unidata/unidata-gen.el (unidata-file-alist): Add new ranges.

* lisp/international/fontset.el (script-representative-chars): Add
new scripts.
(otf-script-alist): Update from latest version.
(setup-default-fontset): Add new scripts.
* lisp/international/characters.el: Update syntax and category
tables for new characters and scripts.
(char-width-table): Update for changes in Unicode 15.0.

* test/lisp/international/ucs-normalize-tests.el
(ucs-normalize-tests--failing-lines-part1)
(ucs-normalize-tests--failing-lines-part2): Update per the test
results.

* doc/lispref/nonascii.texi (Character Properties): Update Unicode
version number.

* etc/NEWS: Announce support for Unicode 15.0.