coreutils: upgrade 9.9 -> 9.10

coreutils: upgrade 9.9 -> 9.10

From https://lists.gnu.org/archive/html/coreutils-announce/2026-02/msg00000.html

Notable changes include:
- Options in man pages link directly into the full web docs
- timeout(1) now kills the command for all terminating signals
- paste(1) is now multi-byte character aware
- cp(1) fixes an unlikely infinite loop introduced in v9.9
- The multi-call binary is 3.2% smaller

Drop the 2 backported patches which are now part of 9.10.

License-Update: copyright years refreshed

For ptests, also install coreutils.texi which is used for a new test that ensures
there is an anchor for each --help option for all of coreutils' programs. See:
   https://cgit.git.savannah.gnu.org/cgit/coreutils.git/commit/?h=v9.10&id=77e6b5d8f8d1ebc3125d6585a266a912a1123791

+---------+--------+-------+------+------+
| Version | Libc   | TOTAL | PASS | SKIP |
+---------+--------+-------+------+------+
| 9.10    | glibc  |  705  |  543 |  162 |
| 9.9     | glibc  |  683  |  527 |  156 |
+---------+--------+-------+------+------+
| diff    | glibc  |   22  |   16 |    6 |
+---------+--------+-------+------+------+
| 9.10    | musl   |  703  |  544 |  159 |
| 9.10    | musl   |  681  |  529 |  152 |
+---------+--------+-------+------+------+
| diff    | musl   |   22  |   15 |    7 |
+---------+--------+-------+------+------+

Most of the skipped tests are due to being "very expensive" according to the coreutils developers.
The other skipped tests need strace, gdb, etc or locale dependencies which has not yet been added.

Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>