Updated Brave Ads UI copy to "Ads received this month" - 1.17.x

[tmancey]

Uplift of #7163
Resolves brave/brave-browser#12719

• 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.

[LaurenWags]

Restarted macOS, Linux, Windows

[kjozwiak]

@tmancey looks like the above needs to be rebased.

[kjozwiak]

Restarting Win x64 via https://ci.brave.com/job/pr-brave-browser-issues-12719-1.17.x-windows/4/ due to build failing as per https://ci.brave.com/job/pr-brave-browser-issues-12719-1.17.x-windows/3/execution/node/200/log/. Looks like there was issues with the node connectivity.

23:56:05  Cannot contact i-04a534545b6634a7a-windows-swarm-0c31abab: hudson.remoting.RequestAbortedException: java.nio.channels.ClosedChannelException
00:01:06  Could not connect to i-04a534545b6634a7a-windows-swarm-0c31abab to send interrupt signal to process

Restarting macOS via https://ci.brave.com/job/pr-brave-browser-issues-12719-1.17.x-macos/4/ due to build failing as per https://ci.brave.com/job/pr-brave-browser-issues-12719-1.17.x-macos/3/execution/node/204/log/.

23:51:21  FAILED: obj/third_party/webrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor/spl_sqrt_floor.o 

[kjozwiak]

Uplift into 1.17.x approved after deliberating with @brave/uplift-approvers. QA has also verified the PR on Nightly as per #7163 (comment).