migrations: archive old migrations before v1.9.1

[etungsten]

Issue number:
N/A

Description of changes:
For reference, the previous archiving: #1699. This makes the same change.

See 2ce22f1 for the last time we did this.

Same explanation as before:
These migrations have already been built and released with Bottlerocket
releases and don't need to be built again.  The build system and os package
currently build everything in the migrations directory, which can take a
significant amount of time with unneeded migrations.

Their source is still useful as a reference, and the files are small, so it's
worthwhile keeping them in-tree rather than having to search git history.

Testing done:
Before this change, time to build os, release packages and aws-k8s-1.23 variant: Finished dev [optimized] target(s) in 3m 25s
After this change, time to build os, release packages and aws-k8s-1.23 variant: Finished dev [optimized] target(s) in 1m 58s

Before this change, the contents of the migrations rpm shows:

[ec2-user@ip-172-31-32-162 rpms]$ rpm -qlp bottlerocket-x86_64-migrations-0.0-0.aarch64.rpm         
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations                                                                        
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.3.0_control-container-v0-5-2         
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.3.0_etc-hosts-service    
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.3.0_hostname-affects-etc-hosts
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.4.0_registry-mirror-representation
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.4.2_admin-container-v0-7-3
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.4.2_control-container-v0-5-3
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.5.0_oci-hooks-setting
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.5.0_oci-hooks-setting-metadata
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.5.1_control-container-v0-5-4
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.5.3_vmware-host-containers
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.6.0_aws-admin-container-v0-7-4
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.6.0_aws-control-container-v0-5-5
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations/migrate_v1.6.0_node-taints-representation
...

After this change, the contents of the migrations rpm is now just the directory and nothing else:

$ rpm -qlp bottlerocket-x86_64-migrations-0.0-0.aarch64.rpm
/x86_64-bottlerocket-linux-gnu/sys-root/usr/share/migrations

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[cbgbt]

Nice, I didn't know we did this previously.