ethtool: T6729: upgrade to 6.10 to make use of more --json options

Same as T6078 but we now wan't to make use of ethtool --json eth0 to drop out
own text based parsing of ethtool options in [1]. This is the base for moving
to a better, machine readable interface

1: https://github.com/vyos/vyos-1x/blob/e47d4fd385631236da68/python/vyos/ethtool.py#L77-L105
(cherry picked from commit 9e7dd13)

packages/ethtool/Jenkinsfile

@@ -22,7 +22,7 @@
 
 def pkgList = [
     ['name': 'ethtool',
-     'scmCommit': 'debian/1%6.6-1',
+     'scmCommit': 'debian/1%6.10-1',
      'scmUrl': 'https://salsa.debian.org/kernel-team/ethtool',
      'buildCmd': 'sudo mk-build-deps --install --tool "apt-get --yes --no-install-recommends"; dpkg-buildpackage -uc -us -tc -b'],
 ]

scripts/package-build/ethtool/package.toml

@@ -1,4 +1,4 @@
 [[packages]]
 name = "ethtool"
-commit_id = "debian/1%6.6-1"
+commit_id = "debian/1%6.10-1"
 scm_url = "https://salsa.debian.org/kernel-team/ethtool"