[workspace] Upgrade stable_baselines3_internal to latest release v1.8.0

[mwoehlke-kitware]

Towards #19137.

Our patches no longer apply and need to be updated.

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This change is 

[jwnimmer-tri]

+@ggould-tri to finish the patch adjustment changes, please. You can push fixes to this branch.

[ggould-tri]

Okay, looking into this soon-ish.

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: LGTM missing from assignee ggould-tri(platform), needs at least two assigned reviewers, labeled "do not merge" (waiting on @mwoehlke-kitware)

[jwnimmer-tri]

@ggould-tri any progress?

[ggould-tri]

Here is the meta-commentary:

• OpenAi deprecated gym prior to stabilizing a release with the new API
• stable-baselines3 had been waiting on that release to complete support for the new API, and we were in turn waiting on sb3.
• Following their acquisition, OpenAi spun up a new foundation which immediately picked up the briefly abandoned gym to create Gymnasium.
• The sb3 team judges gymnasium stable enough, and has begun the process of migrating from a gym "backend" to a gymnasium "backend" (there is not clearly a "back" to be on the end of; each of gym and sb3 might reasonably consider the other a backend).
• Gymnasium 1.0 and sb3 2.0 are both targeted for circa June.

As such, I'm going to try to do something minimal for this PR, in the not-especially-sure-and-certain faith that it's all about to change anyway. The new API is unambiguously superior and we will likely want to migrate to it promptly.

[jwnimmer-tri]

If there is any difficulty, another option is to set commit_pin = True with a TODO to revisit at a later date.

drake/tools/workspace/github.bzl

Lines 29 to 31 in 8c106eb

	commit_pin: optional boolean, set to True iff the archive should remain
	at the same version indefinitely, eschewing automated upgrades to
	newer versions.

[ggould-tri]

Updated to text that worked for me locally. I had some trouble getting the push to branch to work, so we'll see if I got it right...

Reviewed 3 of 3 files at r2, all commit messages.
Reviewable status: LGTM missing from assignee ggould-tri(platform), needs at least two assigned reviewers, labeled "do not merge", commits need curation (https://drake.mit.edu/reviewable.html#curated-commits) (waiting on @ggould-tri and @mwoehlke-kitware)

[ggould-tri]

Passes CI. -(status: do not merge)

Reviewable status: LGTM missing from assignee ggould-tri(platform), needs at least two assigned reviewers, labeled "do not merge", commits need curation (https://drake.mit.edu/reviewable.html#curated-commits) (waiting on @ggould-tri and @mwoehlke-kitware)

[ggould-tri]

Was this waiting on me? +(status: single reviewer ok) if that's what's needed.

Reviewable status: commits need curation (https://drake.mit.edu/reviewable.html#curated-commits) (waiting on @mwoehlke-kitware)

[jwnimmer-tri]

Yeah, it was waiting for platform review to be assigned, I guess. It looks good to me, also. Feel free to squash and merge.

[ggould-tri]

+(status: squashing now)

Reviewable status: complete! all discussions resolved, LGTM from assignee ggould-tri(platform)