Reland "PA: Invert MiraclePtr Platform Enablement Logic"

This reverts commit 19b5dd0c20337d8e914f83145b42d87243eb82b0.

Reason for reland: I re-invert the DPD condition in patchset 2

Original change's description:
> Revert "PA: Invert MiraclePtr Platform Enablement Logic"
>
> This reverts commit c3e9990871416987bd6c9d30624e4b6fa0b5e4bc.
>
> Reason for revert: I just realize I inverted the DPD condition
> causing it to be enabled in non dcheck builds.
>
> Original change's description:
> > PA: Invert MiraclePtr Platform Enablement Logic
> >
> > This patch inverts the build flags logic from an "allowlist" of platform
> > toward a "deny list".
> >
> > - **Increased Confidence**: Guarantees MiraclePtr is active everywhere
> >   unless explicitly disabled, reducing the risk of unexpected
> >   vulnerabilities on niche platforms.
> >
> > - **Future-Proofing**: Potentially new platforms automatically inherit
> >   MiraclePtr from the beginning, eliminating the need to "ship" it one
> >   more time.
> >
> > - **Simplified Maintenance**: Focus shifts to maintaining a small,
> >   explicit list of exceptions rather than a growing list of enabled
> >   platforms.
> >
> > What is the "complementary"?
> > -----------------------------
> >
> > We know from `//build/config/BUILDCONFIG` the current_os is limited to:
> >   aix     , android , chromeos
> >   fuchsia , ios     , linux
> >   mac     , nacl    , win
> >   winuwp  , zos
> >
> > "aix" and "zos" aren't supported by Chrome, only V8. So they can be
> > ignored.
> >
> > Bug: 364466913
> > Change-Id: Ia03f8f18a4b3bb05e4c9d304980cadcf235be3c5
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5837217
> > Reviewed-by: Keishi Hattori <keishi@chromium.org>
> > Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
> > Reviewed-by: Wez <wez@chromium.org>
> > Reviewed-by: danakj <danakj@chromium.org>
> > Auto-Submit: Arthur Sonzogni <arthursonzogni@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#1352670}
>
> Bug: 364466913
> Change-Id: I7ed0231bfa46b2091041df6ef7c09a7726cfacc1
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5844793
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Owners-Override: Arthur Sonzogni <arthursonzogni@chromium.org>
> Auto-Submit: Arthur Sonzogni <arthursonzogni@chromium.org>
> Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1352693}

Bug: 364466913
Change-Id: I315ccb248b5d6323849883aad085c93db218d2d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5844931
Reviewed-by: danakj <danakj@chromium.org>
Auto-Submit: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Keishi Hattori <keishi@chromium.org>
Commit-Queue: Keishi Hattori <keishi@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1354441}