Fixes reduced delivery of Brave ads campaigns with subdivision targeting - 1.32.x

[tmancey]

Uplift of #10551
Resolves brave/brave-browser#18748

• You have checked CI and the builds, lint, and tests all pass or are not related to your PR.
• You have tested your change on Nightly.
• The PR milestones match the branch they are landing to.

After you merge:

• The associated issue milestone is set to the smallest version that the changes is landed on.

[kjozwiak]

@tmancey looks all the platforms are failing due to the same issue. Mind taking a look?

 FAILED: obj/brave/vendor/bat-native-ads/ads/eligible_inline_content_ads.o 

 ../../brave/vendor/bat-native-ads/src/bat/ads/internal/eligible_ads/inline_content_ads/eligible_inline_content_ads.cc:259:29: error: use of undeclared identifier 'creative_ads'
10:48:39        ShouldCapLastServedAd(creative_ads) ? last_served_creative_ad_ : AdInfo(),
10:48:39                              ^
10:48:39  1 error generated.

[kjozwiak]

Adding PR/Blocked until the above is fixed. @tmancey once resolved, mind removing the PR/Blocked? Thanks!

[kjozwiak]

Uplift into 1.32.x approved after deliberating with @brave/uplift-approvers. QA has verified the PR on Nightly as per #10551 (comment).