🐛 Fix broken manylinux wheels (#376)

## Description

Due to the way Linux wheels are built by cibuildwheel (in a manylinux
docker container), environment varaiables are not passed down to the
container. As a result the `CI` environment variable is not defined in
the docker container, which is used to flip on the `DEPLOY` CMake
setting automatically.
This has lead to manylinux wheels being built with `-march=native` that
might produce errors like
```console
Illegal instruction (core dumped)
```
when trying to import the respective packages.

This PR fixes this by making sure that `DEPLOY="ON"` within
cibuildwheel.

Fixes #375 

## Checklist:

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- [x] The pull request only contains commits that are related to it.
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project's style guidelines.

pyproject.toml

@@ -235,7 +235,7 @@ test-skip = "cp312-*"  # Qiskit Terra does not support Python 3.12 yet
 build-frontend = "build"
 
 [tool.cibuildwheel.linux]
-environment = { Z3_ROOT="/opt/python/cp311-cp311/lib/python3.11/site-packages/z3" }
+environment = { Z3_ROOT="/opt/python/cp311-cp311/lib/python3.11/site-packages/z3", DEPLOY="ON" }
 before-all = "/opt/python/cp311-cp311/bin/pip install z3-solver==4.11.2"
 repair-wheel-command = [
     "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/python/cp311-cp311/lib/python3.11/site-packages/z3/lib",