Tezt: More use of the agnostic baker in tezt tests

What

Part of #7773 (closed).

In this MR we remove the use of the protocol specific baker binaries from:

• tenderbake long test : this is not in the CI
• baker_test manual test : this is not in the CI, and on my machine it does not work (with either type of baker, it has not been touched in a while, but this can be a different discussion, independent of this simple MR)
• TEZT_CLOUD changes for the Layer1 and Dal scenarios => they need to be tested manually to ensure this changes do not break them + it is also one more confirmation that the agnostic baker works properly
• Lib_octogram : I am not sure how to test if everything is fine, but I am also not sure that this library is still used, since not much activity was seen on it + the changes are trivial
• Bin_tps_evaluation : same as lib_octogram
• vdf_test : dune exec tezt/tests/main.exe -- --file vdf_test.ml
• tezt_wrapper : octez_baker_alpha was not used anywhere from what I see

Why

This is a step towards the removal of Baker module from Tezt and the removal of the baker value from the Protocol module from Tezt.

How

Manually testing the MR

CI green + Tezt-cloud scenarios + vdf_test command

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR