bootstrap_image and the local repositories

[praiskup]

We can not use user_mountpoints because these aren't (historically, not
sure what are the reasons) mounted too late during the Buildroot
preparation (after the self._init_pkg_management()).  This isn't
actually an issue when 'use_bootstrap_image == False' because we use the
package manager on host (so it actually sees the repository on host).

So newly we place the local_repo mount points into the "managed"
category, which seems even semantically better now.  We though need to
call the 'self.mounts.mountall_managed()' method a little bit later than
before, when the local repo BindMountPoints are already defined by
self.pkg_manager.initialize().

This problem has been triggered by the LVM test-case that creates a
custom local_repo (on host) with `baseurl=/tmp/foo` that needs to be
bind-mounted into the bootstrap chroot properly.

[FrostyX]

I tried the combination of local repositories and bootstrap image and it seems to work even without this PR

git checkout main

PYTHONPATH=/home/jkadlcik/git/mock/mock/py \
    sudo python3 py/mock.py \
    -r /etc/mock/fedora-38-x86_64.cfg \
    --configdir ../mock-core-configs/etc/mock \
    --bootstrap-chroot \
    --use-bootstrap-image \
    -a file:///home/jkadlcik/repo --install copr-cli

And the repo is successfully synced

file:///home/jkadlcik/repo                       2.9 MB/s | 3.0 kB     00:00
fedora                                           150 kB/s |  19 kB     00:00
updates                                          193 kB/s |  18 kB     00:00
local                                            2.9 MB/s | 3.0 kB     00:00

and the package is successfully installed from the repository

Dependencies resolved.
===================================================================================================
 Package                    Version                                        Repository              
===================================================================================================
Installing:
 copr-cli                   1.109-1.git.66.688323e.fc38                    _home_jkadlcik_repo     

So I am probably misunderstanding the issue?

[praiskup]

PYTHONPATH=/home/jkadlcik/git/mock/mock/py \

Wow, I was never able to run Mock like that, I always do tito build --test --rpm --install first. Nice.

So I am probably misunderstanding the issue?

I bet this is related to --isolation=simple, i.e. the mock-in-container case. Can you please re-try?
The problem has been triggered by one of these cases:

mock/mock/integration-tests/24-postinstall.tst

Lines 18 to 19 in 6c7efb6

	for isolation in simple nspawn; do
	for bootstrap in no-bootstrap-chroot bootstrap-chroot; do

[praiskup]

You might need to --scrub=all first actually.

[praiskup]

Ouch, no, this was detected by a different test case, sorry:

mock/mock/integration-tests/20-lvm-plugin.tst

Lines 63 to 64 in 6c7efb6

	# Put the first RPMs into buildroot.
	runcmd "$MOCKCMD --rebuild $srpm_version1 --resultdir $REPODIR" \

[praiskup]

I updated the commit message with the info on how this can be triggered.