Reland "Introduce policy scope enum into PolicyDetails"

This reverts commit acf25b09e42fe24738a78dee49f68e51fc6ef867.

Reason for revert: Reland the CL with fix

Original change's description:
> Revert "Introduce policy scope enum into PolicyDetails"
>
> This reverts commit 036fcff254cd837a85c467072a8e54e78bee41c5.
>
> Reason for revert:
> Causing a compile failure: https://ci.chromium.org/ui/p/chromium/builders/ci/Libfuzzer%20Upload%20Chrome%20OS%20ASan/110978/overview
>
> Original change's description:
> > Introduce policy scope enum into PolicyDetails
> >
> > The scope enum flag replaces the is_device_only boolean one to provide
> > policy scope information for browser policies.
> >
> > Scope are decided by per-profile flag and the new user-only flag which
> > indicates that the policy can't be set via CBCM or platform management
> > tools.
> >
> > The new flag can help us showing error message on chrome://policy page
> > and blocking unsupported policy source.
> >
> > Bug: 327668218
> > Change-Id: I29b9f73ea07b7f24030bd8f053c26c7734c1010a
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5447888
> > Reviewed-by: Yann Dago <ydago@chromium.org>
> > Commit-Queue: Owen Min <zmin@chromium.org>
> > Reviewed-by: Artem Sumaneev <asumaneev@google.com>
> > Cr-Commit-Position: refs/heads/main@{#1292608}
>
> Bug: 327668218
> Change-Id: Iaf11a219df59c494a59776b6dd17f4c3408334ed
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5490600
> Owners-Override: Takumi Fujimoto <takumif@chromium.org>
> Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Auto-Submit: Takumi Fujimoto <takumif@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1292807}

Bug: 327668218
Change-Id: Ia8990992f93d57b830f2df0e82fc10cb4584c30a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5491472
Commit-Queue: Owen Min <zmin@chromium.org>
Reviewed-by: Yann Dago <ydago@chromium.org>
Reviewed-by: Artem Sumaneev <asumaneev@google.com>
Cr-Commit-Position: refs/heads/main@{#1293689}