Reland "Enable fieldtrial testing config for HttpsUpgrades"

This is a reland of commit a1ec2921

Original change's description:
> Enable fieldtrial testing config for HttpsUpgrades
>
> The bulk of the tests failing due to Https Upgrades feature have been
> handled in crbug.com/1424194.
>
> This CL fixes the remaining tests by allowlisting affected hostnames
> and enables the feature in test configs.
>
> Bug: 1394910
> Change-Id: Iac5de38af86eb3f9b0f3ac5ca89386938b63200a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4312951


> Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
> Commit-Queue: Mustafa Emre Acer <meacer@chromium.org>
> Reviewed-by: Devlin Cronin <rdevlin.cronin@chromium.org>
> Reviewed-by: Carlos IL <carlosil@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1118919}

Bug: 1394910
Change-Id: Ief79f4cd92f6e376bbd5412ee4de91b7014eb02a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4355331


Commit-Queue: Mustafa Emre Acer <meacer@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Reviewed-by: Carlos IL <carlosil@chromium.org>
Reviewed-by: Devlin Cronin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1119635}