[multiple]: Support agent-based BM SNO deployment

Allow deploying SNO OCP for RHOSO control plane instead of
the classic hybrid jobs approach.

Change the controller-0 which runs dev-scripts and deploy
architecture script to become the zuul controller node.

Skip libvirt/vmnet configuration and use no VMs at all.

Ditch dev-scripts and use agent-based openshift-installer
to also cover scenarios with isolated L2 domains between
zuul controller, SNO BM, and EDPM BM (will be added in
the future).

Allow to auto configure usb boot on the target SNO host,
and allow auto-discovery (or validation) of UEFI target
to boot from as Virtual Media Live CD. It is important
to make sure we boot from the image that we build as
we do not wipe the target host disks, and without
those guard rails it may result in confusing behavior
(booting from unexpected sources).

Allow live debug mode for agent appliance.

Password handling for agent aplliance and OCP:
* Pre-ISO generation (for post-bootstrap):
  - MachineConfig 99-core-password.yaml -- sets password via MCO after
    cluster is up
* Post-ISO generation (for discovery phase):
  - coreos-installer iso ignition show -- extracts the embedded
    ignition from the agent ISO
  - patch_ignition.py -- patches the ignition JSON to add
    passwordHash on the core user and a getty@tty1.service autologin
    drop-in
  - coreos-installer iso ignition embed -f -- re-embeds the patched
    ignition back into the ISO

Generated-by: Cursor (claude-4.6-opus-high)
Signed-off-by: Bohdan Dobrelia <bdobreli@redhat.com>

Author: bogdando

docs/dictionary/en-custom.txt

@@ -1,17 +1,35 @@
+APIs
+Amartya
+AssignedTeam
+CP
+CPython
+ClusterServiceVersion
+FreeIPA
+IDM
+IMVHO
+IdP
+Idempotency
+LDAP
+LLM
+MachineConfig
+NodeHealthCheck
+RHCOS
+SNO
+Sinha
+UTF
+ZipFile
 aaabbcc
 abcdefghij
 addr
 afuscoar
 alertmanager
-Amartya
 amartyasinha
 ansible
 ansibleee
 ansibletest
 ansibletests
 ansibleuser
 ansiblevars
-APIs
 apiversion
 apivips
 appcreds
@@ -20,12 +38,12 @@ aqc
 args
 arx
 arxcruz
-AssignedTeam
 auth
 authfile
 autoconfiguration
 autohold
 autoholds
+autologin
 autoscale
 autostart
 awk
@@ -90,7 +108,6 @@ cli
 client
 clusterimageset
 clusterpool
-ClusterServiceVersion
 cmd
 cn
 cni
@@ -105,9 +122,7 @@ containerfile
 controlplane
 coredns
 coreos
-CP
 cpus
-CPython
 crashloopbackoff
 crb
 crc
@@ -144,6 +159,7 @@ deprovision
 deps
 dest
 dev
+devscript
 devscripts
 devsetup
 dfb
@@ -185,8 +201,8 @@ epel
 epyc
 etcd
 eth
-extraimages
 extraRPMs
+extraimages
 ezzmy
 favorit
 fbqufbqkfbzxrja
@@ -201,7 +217,6 @@ flbxutz
 fmw
 fqdn
 freefonts
-FreeIPA
 frmo
 fsid
 fultonj
@@ -238,27 +253,25 @@ hotfix
 href
 hsm
 hsms
+httpd
 https
 ic
 icjbuue
 icokicagy
-IDM
-IdP
-Idempotency
 idrac
-imagecontentsourcepolicy
 iface
 igfsbg
 igmp
 igogicbjyxbzig
 ihbyb
+imagecontentsourcepolicy
 img
-IMVHO
 ingressvips
 ini
 init
 installplan
 installyamls
+internalapi
 ipaddr
 ipam
 ipi
@@ -306,18 +319,16 @@ kuttl
 kvm
 lacp
 lajly
-LDAP
 ldp
 libguestfs
 libvirt
+libvirt's
 libvirtd
 libvirterror
-libvirt's
 ljaumtawojy
 ljaumtaxojy
 ljaumtayojy
 lkid
-LLM
 lmxpynzpcnrdcmfkbwluihnvy
 localhost
 localnet
@@ -372,9 +383,9 @@ netconfig
 netmask
 networkattachmentdefinition
 networkconfig
+networker
 networkmanager
 networktype
-networker
 nfs
 nftables
 nhc
@@ -386,7 +397,6 @@ nmstate
 nncp
 nobuild
 nodeexporter
-NodeHealthCheck
 nodenetworkconfigurationpolicy
 nodepool
 nodeps
@@ -403,12 +413,12 @@ nwy
 nzgdh
 oauth
 observability
-oidc
 oc
 ocp
 ocpbm
 ocppr
 odkvmf
+oidc
 okd
 ol
 olm
@@ -539,7 +549,6 @@ sha
 shiftstack
 shiftstackclient
 sig
-Sinha
 sizepercent
 skbg
 skiplist
@@ -606,7 +615,6 @@ uoyt
 uri
 usermod
 usr
-UTF
 utils
 uuid
 vbibob
@@ -663,7 +671,6 @@ ytm
 yxivcnvul
 yyoje
 yyyy
-ZipFile
 zlcbwcm
 zm
 zpbgugcmjkihbvb