Drop test_embed from PGO training

[neonene]

Feature or enhancement

Proposal:

The number of unit tests for PGO profile build was reduced in gh-80225 (bpo-36044). Additionally, recent versions of CPython could skip test_embed, which is considered to have become bigger for its contribution.

The git-main has already disabled it in b00e125, which should be explicit and backported to compare benchmarks rationally.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

#129377

Linked PRs

• gh-129660: Do not use test_embed in PGO profile builds #129661
• [3.13] gh-129660: Do not use test_embed in PGO profile builds #129662
• [3.12] gh-129660: Do not use test_embed in PGO profile builds (GH-129662) #129685