Backport of configgen: escape any invalid HCL syntax in map keys into v1.9

[github-actions]

Backport

This PR is auto-generated from #35837 to be assessed for backporting due to the inclusion of the label 1.9-backport.

🚨

Warning automatic cherry-pick of commits failed. If the first commit failed,
you will see a blank no-op commit below. If at least one commit succeeded, you
will see the cherry-picked commits up to, not including, the commit where
the merge conflict occurred.

The person who merged in the original PR is:
@liamcervante
This person should manually cherry-pick the original PR into a new backport PR,
and close this one when the manual backport PR is merged in.

merge conflict error: unable to process merge commit: "e068043c59717f6f1881c5ca04126f09b1ece851", automatic backport requires rebase workflow

The below text is copied from the body of the original PR.

---

This PR updates the config generation so that any invalid HCL syntax in generated map keys is escaped and not just whitespace.

Fixes #35752

Target Release

1.9.x

Draft CHANGELOG entry

BUG FIXES

• config generation: Escape all invalid syntax in generate map keys with quotes.

---

Overview of commits

• d7f1d5b

• e068043

[liamcervante]

This cherry-pick is actually fine - it only failed the merge that was needed to make unrelated tests pass. These tests were never merged to this branch.

[github-actions]

Reminder for the merging maintainer: if this is a user-visible change, please update the changelog on the appropriate release branch.