gh-128690: Use test_embed in PGO profile builds again

[neonene]

This reverts the temporal commit b00e125.

The issue with test_init_pyvenv_cfg failing is closed as resolved.

cc @ned-deily

• Issue: test_embed.test_init_pyvenv_cfg() fails #128690

[vstinner]

test_embed is slow and mostly spawns sub-processes. I'm not convinced that it's an useful tests to train the PGO build.

cc @pablogsal @corona10 @markshannon

[neonene]

I'd prefer a more explicit announcement if test_embed will not be used in PGO. Also, I'd prefer older versions (3.10 to 3.13) to have the same conditions.

[vstinner]

I'd prefer a more explicit announcement if test_embed will not be used in PGO. Also, I'd prefer older versions (3.10 to 3.13) to have the same conditions.

I suggest to also remove test_embed from 3.12 and 3.13 in this case, and document the change in the Build category.

[neonene]

I suggest to also remove test_embed from 3.12 and 3.13 in this case, and document the change in the Build category.

I have opened #129660.