osbuild: set sysroot.bootprefix true in OSTree config

This is a second round of f5677a3 (reverted in db7bf08).

Now that coreos-installer in rawhide has
coreos/coreos-installer#1422
we can set sysroot.bootprefix to true again.

We can't do it in the non-OSBuild configs because not all streams
have the new coreos-installer yet.

Here is the comment from the original commit:

This setting will make it so that BLS config entries get prepended
with /boot. OSTree already places a boot -> . symlink in the root
of the boot filesystem prepending with /boot will always just work.

For context see osbuild/osbuild#1566 (comment)

This also allows for dropping one of the upstream OSBuild zipl stage
patches.

build.sh

@@ -177,7 +177,6 @@ patch_osbuild() {
 
     # Now all the software is under the /usr/lib/osbuild dir and we can patch
     cat /usr/lib/coreos-assembler/0004-fscache-add-eviction-log-statement.patch                   \
-        /usr/lib/coreos-assembler/0001-stages-zipl.inst-improve-kernel-initrd-path-resoluti.patch \
         /usr/lib/coreos-assembler/0001-stages-qemu-sanity-check-created-image.patch               \
         /usr/lib/coreos-assembler/0001-util-Add-bls-module.patch                                  \
         /usr/lib/coreos-assembler/0002-Add-coreos.platforms-stage.patch                           \

src/osbuild-manifests/coreos.osbuild.aarch64.mpp.yaml

@@ -106,6 +106,12 @@ pipelines:
               bootloader: none
               # https://github.com/coreos/fedora-coreos-tracker/issues/1333
               bls-append-except-default: grub_users=""
+              # Opt-in to https://github.com/ostreedev/ostree/pull/2705 which will
+              # add /boot as the prefix on top of BLS config entries. This is OK
+              # because there is a symlink that is created in the root of the boot
+              # filesystem by OSTree (boot -> .) that makes it so that /boot paths
+              # will always work.
+              bootprefix: true
       - type: org.osbuild.mkdir
         options:
           paths:

src/osbuild-manifests/coreos.osbuild.ppc64le.mpp.yaml

@@ -108,6 +108,12 @@ pipelines:
               bootloader: none
               # https://github.com/coreos/fedora-coreos-tracker/issues/1333
               bls-append-except-default: grub_users=""
+              # Opt-in to https://github.com/ostreedev/ostree/pull/2705 which will
+              # add /boot as the prefix on top of BLS config entries. This is OK
+              # because there is a symlink that is created in the root of the boot
+              # filesystem by OSTree (boot -> .) that makes it so that /boot paths
+              # will always work.
+              bootprefix: true
       - type: org.osbuild.ignition
       # Deploy via container if we have a container ociarchive, else from repo.
       - mpp-if: ociarchive != ''

src/osbuild-manifests/coreos.osbuild.s390x.mpp.yaml

@@ -95,6 +95,12 @@ pipelines:
               bootloader: none
              ## no grub_users="" on s390x
              #bls-append-except-default: grub_users=""
+              # Opt-in to https://github.com/ostreedev/ostree/pull/2705 which will
+              # add /boot as the prefix on top of BLS config entries. This is OK
+              # because there is a symlink that is created in the root of the boot
+              # filesystem by OSTree (boot -> .) that makes it so that /boot paths
+              # will always work.
+              bootprefix: true
       - type: org.osbuild.ignition
       # Deploy via container if we have a container ociarchive, else from repo.
       - mpp-if: ociarchive != ''

src/osbuild-manifests/coreos.osbuild.x86_64.mpp.yaml

@@ -108,6 +108,12 @@ pipelines:
               bootloader: none
               # https://github.com/coreos/fedora-coreos-tracker/issues/1333
               bls-append-except-default: grub_users=""
+              # Opt-in to https://github.com/ostreedev/ostree/pull/2705 which will
+              # add /boot as the prefix on top of BLS config entries. This is OK
+              # because there is a symlink that is created in the root of the boot
+              # filesystem by OSTree (boot -> .) that makes it so that /boot paths
+              # will always work.
+              bootprefix: true
       - type: org.osbuild.mkdir
         options:
           paths: