The IRONIC_RAMDISK_TYPE setting allowed users to choose between
'tinyipa' and 'dib' ramdisk types. With tinyipa support dropped,
this setting is no longer needed. DIB is now the only ramdisk
type and is used by default.
This change removes:
- IRONIC_RAMDISK_TYPE variable and validation
- tinyipa-specific build functions (build_tinyipa_ramdisk,
rebuild_tinyipa_for_ansible)
- is_ansible_with_tinyipa helper function
- tinyipa references from documentation and CI configuration
Assisted-By: Claude Code - Claude Sonnet 4.5
Change-Id: Ic7222888a6ed8e8353ca20a5a5b1aa1c6a948b53
Signed-off-by: Julia Kreger <juliaashleykreger@gmail.com>