cli-plugins/manager: allow schema-versions <= 2.0.0

[thaJeztah]

The CLI currently hard-codes the schema-version for CLI plugins to "0.1.0", which doesn't allow us to expand the schema for plugins.

As there's many plugins that we shipped already, we can't break compatibility until we reach 2.0.0, but we can expand the schema with non-breaking changes.

This patch makes the validation more permissive to allow new schema versions <= 2.0.0. Note that existing CLIs will still invalidate such versions, so we cannot update the version until such CLIs are no longer expected to be used, but this patch lays the ground-work to open that option.

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[thaJeztah]

Hm... alpine broken? Just had it on another PR as well;

#21 [engine 2/4] RUN apk --no-cache upgrade openssh-client &&   apk --no-cache add shadow openssh-server &&   groupadd -f docker &&   useradd --create-home --shell /bin/sh --password $(head -c32 /dev/urandom | base64) penguin &&   usermod -aG docker penguin &&   ssh-keygen -A
#21 0.111 fetch https://dl-cdn.alpinelinux.org/alpine/v3.22/main/x86_64/APKINDEX.tar.gz
#21 0.202 fetch https://dl-cdn.alpinelinux.org/alpine/v3.22/community/x86_64/APKINDEX.tar.gz
#21 0.522 (1/3) Upgrading openssh-keygen (10.0_p1-r7 -> 10.0_p1-r8)
#21 0.536 (2/3) Upgrading openssh-client-common (10.0_p1-r7 -> 10.0_p1-r8)
#21 0.568 (3/3) Upgrading openssh-client-default (10.0_p1-r7 -> 10.0_p1-r8)
#21 0.583 Executing busybox-1.37.0-r18.trigger
#21 0.591 OK: 41 MiB in 75 packages
#21 0.671 fetch https://dl-cdn.alpinelinux.org/alpine/v3.22/main/x86_64/APKINDEX.tar.gz
#21 0.793 fetch https://dl-cdn.alpinelinux.org/alpine/v3.22/community/x86_64/APKINDEX.tar.gz
#21 1.089 (1/3) Installing openssh-server-common (10.0_p1-r8)
#21 1.101 (2/3) Installing openssh-server (10.0_p1-r8)
#21 1.128 (3/3) Installing shadow (4.17.3-r0)
#21 1.151 Executing busybox-1.37.0-r18.trigger
#21 1.156 OK: 44 MiB in 78 packages
#21 1.256 OpenSSL version mismatch. Built against 3050003f, you have 30500020
#21 ERROR: process "/bin/sh -c apk --no-cache upgrade openssh-client &&   apk --no-cache add shadow openssh-server &&   groupadd -f docker &&   useradd --create-home --shell /bin/sh --password $(head -c32 /dev/urandom | base64) penguin &&   usermod -aG docker penguin &&   ssh-keygen -A" did not complete successfully: exit code: 255
------
 > [engine 2/4] RUN apk --no-cache upgrade openssh-client &&   apk --no-cache add shadow openssh-server &&   groupadd -f docker &&   useradd --create-home --shell /bin/sh --password $(head -c32 /dev/urandom | base64) penguin &&   usermod -aG docker penguin &&   ssh-keygen -A:
0.583 Executing busybox-1.37.0-r18.trigger
0.591 OK: 41 MiB in 75 packages
0.671 fetch https://dl-cdn.alpinelinux.org/alpine/v3.22/main/x86_64/APKINDEX.tar.gz
0.793 fetch https://dl-cdn.alpinelinux.org/alpine/v3.22/community/x86_64/APKINDEX.tar.gz
1.089 (1/3) Installing openssh-server-common (10.0_p1-r8)
1.101 (2/3) Installing openssh-server (10.0_p1-r8)
1.128 (3/3) Installing shadow (4.17.3-r0)
1.151 Executing busybox-1.37.0-r18.trigger
1.156 OK: 44 MiB in 78 packages
1.256 OpenSSL version mismatch. Built against 3050003f, you have 30500020

[thaJeztah]

Minimal reproducer;

docker run -it --rm alpine:3.22 sh -c 'apk --no-cache -qq add openssh-server && ssh-keygen -A'
OpenSSL version mismatch. Built against 3050003f, you have 30500010