Gitlab-CI: needs:parallel:matrix not working with inputs interpolations

Summary

Beta feature Matrix expressions (#423553) don't allow the usage of matrix and inputs at the same time.

Steps to reproduce

1. Create a new project

2. Create a gitlab-ci.yaml with the following content:

   spec: {}
   ---
   
   linux:build:
     script: echo "Building linux..."
     parallel:
       matrix:
         - PROVIDER: [aws]
   
   linux:test:
     script: echo "Testing linux..."
     parallel:
       matrix:
         - PROVIDER: [aws]
     needs:
       - job: linux:build
         parallel:
           matrix:
             - PROVIDER: ['$[[ matrix.PROVIDER ]]']

3. look at the pipeline status

4. pipeline fail with the following errors:

   Unable to create pipeline

   `.gitlab-ci.yml`: unknown interpolation provided: `matrix` in `matrix.PROVIDER`

Tested in Gitlab.com and self-managed Kubernetes instance.

Example Project

Example project: https://gitlab.com/julesdeCube/ci-matrix-expressions-with-inputs-bug/

Example of failing pipeline: https://gitlab.com/julesdeCube/ci-matrix-expressions-with-inputs-bug/-/pipelines/2127691688

What is the current bug behavior?

Pipeline fail to create with an unknown interpolation provided error.

What is the expected correct behavior?

Pipeline should be created and linux:test jobs should depend on linux:build.

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

System information
System:		
Current User:	git
Using RVM:	no
Ruby Version:	3.2.8
Gem Version:	3.7.1
Bundler Version:2.7.1
Rake Version:	13.0.6
Redis Version:	7.0.15
Sidekiq Version:7.3.9
Go Version:	unknown
GitLab information
Version:	18.5.1
Revision:	2e5ae10576d
Directory:	/srv/gitlab
DB Adapter:	PostgreSQL
DB Version:	16.10
URL:		https://[REDACTED]
HTTP Clone URL:	https://[REDACTED]/some-group/some-project.git
SSH Clone URL:	git@[REDACTED]:some-group/some-project.git
Using LDAP:	no
Using Omniauth:	yes
Omniauth Providers: openid_connect
GitLab Shell
Version:	14.45.3
Repository storages:
default: 	tcp://gitlab-gitaly-0.gitlab-gitaly.gitlab.svc:8075
GitLab Shell path:		/home/git/gitlab-shell
Gitaly
default Address: 	tcp://gitlab-gitaly-0.gitlab-gitaly.gitlab.svc:8075
default Version: 	18.5.1
default Git Version: 	2.50.1

Results of GitLab application Check

Expand for output related to the GitLab application check

gitlab-shell self-check failed
  Try fixing it:
  Make sure GitLab is running;
  Check the gitlab-shell configuration file:
  sudo -u git -H editor /home/git/gitlab-shell/config.yml
  Please fix the error above and rerun the checks.
Checking GitLab Shell ... Finished
Checking Gitaly ...
Gitaly: ... default ... OK
Checking Gitaly ... Finished
Checking Sidekiq ...
Sidekiq: ... Running? ... no
Try fixing it:
sudo -u git -H RAILS_ENV=production bin/background_jobs start
For more information see:
doc/install/installation.md in section "Install Init Script"
see log/sidekiq.log for possible errors
Please fix the error above and rerun the checks.
Checking Sidekiq ... Finished
Checking Incoming Email ...
Incoming Email: ... Reply by email is disabled in config/gitlab.yml
Checking Incoming Email ... Finished
Checking LDAP ...
LDAP: ... LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab App ...
Database config exists? ... yes
Tables are truncated? ... skipped
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Cable config exists? ... yes
Resque config exists? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... skipped (no tmp uploads folder yet)
Systemd unit files or init script exist? ... no
Try fixing it:
Install the Service
For more information see:
doc/install/installation.md in section "Install the Service"
Please fix the error above and rerun the checks.
Systemd unit files or init script up-to-date? ... can't check because of previous errors
Projects have namespace: ...
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Redis version >= 6.2.14? ... yes
Ruby version >= 3.0.6 ? ... yes (3.2.8)
Git user has default SSH configuration? ... yes
Active users: ... 325
Is authorized keys file accessible? ... skipped (authorized keys not enabled)
GitLab configured to store new projects in hashed storage? ... yes
All projects are in hashed storage? ... yes
Checking GitLab App ... Finished
Checking GitLab subtasks ... Finished

Possible fixes

The error probably came from inputs expansion don't understanding the matrix.* variables.

A possible temporary solution will be to escape the interpolation but this don't seems currently supported (I didn't found how to escape interpolation).