Change mech dependency of OLAS from branch "gabriel/olas-deps" to "main"

[gabrielfior]

We want to have the PMAT dependency on Olas pointing to the main branch, instead of the gabriel/olas-deps branch (as in this file).

Since we are using a forked repo (https://github.com/gabrielfior/subgrounds/) as dependency on branch gabriel/olas-deps and that cannot be published on PyPI (see error below), we need to wait for the subgrounds new version (1.9.*) to be released (should happen soon).

Error

HTTP Error 400: Can't have direct dependency: subgrounds@ git+https://github.com/gabrielfior/subgrounds@main. See https://packaging.python.org/specifications/core-metadata for more information.

Implementation:

• Checkout gabriel/olas-deps branch
• Specify subgrounds new version (see latest release, should be 1.9.x)
• Open PR, merge

[gabrielfior]

Remaining action items

• PR opened for subgrounds to fix dependencies (Relaxed pytest-asyncio dependency 0xPlaygrounds/subgrounds#58)
• Once PR 58 above is merged, change pyproject.toml on PMAT to point to new release (likely 1.9.1)
• Try building/publishing PMAT with new dependency manually, make sure it works
• Open PR on PMAT with new subgrounds dependency