Not able to clone nested child app in dev mode.

[sangee2004]

acorn version - v0.9.0-rc1-29-g28f2b006+28f2b006
Steps to reproduce the problem:

1. Copy all files from https://github.com/acorn-io/mariadb to your repo.
2. Change Acorn file of consuming app - https://github.com/acorn-io/mariadb/blob/main/examples/my-todo/Acornfile to build Mariadb app instead of using an image

services: db: build: {
	acornfile: "../../Acornfile"
        context: "../.."
}

containers: app: {
	build: context: "."
	ports: publish: "8000/http"
	consumes: ["db"]
	env: {
		DB_HOST: "@{service.db.address}"
		DB_PORT: "@{service.db.port.3306}"
		DB_NAME: "@{service.db.data.dbName}"
		DB_USER: "@{service.db.secrets.admin.username}"
		DB_PASS: "@{service.db.secrets.admin.password}"
                MY_TEST: "hello"
	}
	if args.dev {
		dirs: "/app":     "./"
		env: FLASK_DEBUG: "1"
	}
}

3. Commit and push to the repo.
4. Deploy app from this repo.

%acorn apps
NAME                    IMAGE                                 COMMIT         CREATED     ENDPOINTS                                                   MESSAGE
mytestmariaprivate      6a42060bde67                          faf324a86e8e   36m ago     http://app-mytestmariaprivate-b22aeb4b.local.oss-acorn.io/   OK
mytestmariaprivate.db   3e7ad2c9847a                          faf324a86e8e   36m ago                                                                 OK

5. Change to a different directory.
6. Clone the db app in dev mode for db

%acorn dev --clone -n mytestmariaprivate.db 
Cloning into 'mytestmariaprivate.db'...
remote: Enumerating objects: 37586, done.
remote: Counting objects: 100% (1054/1054), done.
remote: Compressing objects: 100% (513/513), done.
remote: Total 37586 (delta 469), reused 1016 (delta 448), pack-reused 36532
Receiving objects: 100% (37586/37586), 33.45 MiB | 11.56 MiB/s, done.
Resolving deltas: 100% (17130/17130), done.
Note: switching to 'faf324a86e8ebb2ecd300826e9e409a848f3e616'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at faf324a8 Testapp
NOTE: The Acornfile used for this acorn differs from the git repository. Run `git status` for more details.
ERRO[0007] Failed to build mytestmariaprivate.db/integration/e2e/testdata/build/testapp/mariadb/examples/my-todo/Acornfile: open mytestmariaprivate.db/integration/e2e/testdata/build/testapp/mariadb/examples/my-todo/icon.png: no such file or directory

Acornfile of db app gets copied over to consuming app's Acornfile which is the one that is trying to get build and fails.

[sangee2004]

Simpler steps to reproduce the issue:

1. Clone from repogit@github.com:sangee2004/mariadb.git - branch testenv (commit id - 84f00c9344c9)
2. Deploy app from mariadb/examples/my-todo directory .

mytestnested            2616c2f88b2d                          84f00c9344c9   9m18s ago   http://app-mytestnested-1cf87343.local.oss-acorn.io         OK
mytestnested.db         1b55d4d8b18c                          84f00c9344c9   9m18s ago                                                               OK

4. Change to a different directory.
5. Clone the db app in dev mode using acorn dev --clone -n mytestnested.db

This results in the following error:

acorn dev --clone -n mytestnested.db 
Cloning into 'mytestnested.db'...
remote: Enumerating objects: 35, done.
remote: Counting objects: 100% (35/35), done.
remote: Compressing objects: 100% (19/19), done.
remote: Total 35 (delta 8), reused 33 (delta 8), pack-reused 0
Receiving objects: 100% (35/35), 18.64 KiB | 9.32 MiB/s, done.
Resolving deltas: 100% (8/8), done.
fatal: reference is not a tree: 84f00c9344c9eee3e9f586d0506e5b6e71121594
failed to checkout revision "84f00c9344c9eee3e9f586d0506e5b6e71121594": <nil>
remote: Enumerating objects: 31, done.
remote: Counting objects: 100% (31/31), done.
remote: Compressing objects: 100% (6/6), done.
remote: Total 24 (delta 13), reused 22 (delta 11), pack-reused 0
Unpacking objects: 100% (24/24), 1.66 KiB | 105.00 KiB/s, done.
From github.com:sangee2004/mariadb
 * [new branch]      main        -> remote1/main
 * [new branch]      mynewcloned -> remote1/mynewcloned
 * [new branch]      testenv     -> remote1/testenv
Note: switching to '84f00c9344c9eee3e9f586d0506e5b6e71121594'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at 84f00c9 Test new changes
NOTE: The Acornfile used for this acorn differs from the git repository. Run `git status` for more details.
ERRO[0003] Failed to build mytestnested.db/examples/my-todo/Acornfile: open mytestnested.db/examples/my-todo/icon.png: no such file or directory 
INFO[0003] Build failed, touch [mytestnested.db/examples/my-todo/Acornfile] to rebuild 

Notice that the contents of - mytestnested.db/examples/my-todo/Acornfile in the cloned directory has contents of mytestnested.db/Acornfile

[sangee2004]

Tested with acorn version - v0.9.0-rc1-43-gbe8054c6+be8054c6

Able to deploy apps in dev mode successfully using --clone option for the child acorn.

Followed the steps from #2247 (comment).

acorn dev --clone -n mytestnested.db succeeds with no errors.
Able to make changes to the Acornfile (relating to the db instance) and see the changes getting deployed in the app successfully.