mtd-utils: Update to version 2.3.0

mtd-utils: Update to version 2.3.0

See announcement mail for list of new features:
https://lists.infradead.org/pipermail/linux-mtd/2025-February/108248.html

Cherry pick some upstream commits which fix build problems in some
situations.

autoreconf fixup is needed now otherwise the build fails with:
```
mtd-utils-2.3.0/missing: line 81: automake-1.16: command not found
```

The code in tests/ubifs_tools-tests/Makemodule.am does not build because
some test data is not packaged in the tar files, do not build code from
this directory.

The size increased only very little:
 61498 bin/targets/ramips/mt7621/packages/nand-utils-2.3.0-r1.apk
101643 bin/targets/ramips/mt7621/packages/ubi-utils-2.3.0-r1.apk
 61243 bin/targets/ramips/mt7621/packages/nand-utils-2.2.1-r1.apk
101291 bin/targets/ramips/mt7621/packages/ubi-utils-2.2.1-r1.apk

Link: https://github.com/openwrt/openwrt/pull/20540
Signed-off-by: Hauke Mehrtens <[email protected]>