Reland "[Benefits] Add IPH for educating users on the existence of credit card benefits."

This is a reland of commit 6dff7dd3

This CL adjusts the session_rate and session_rate_impact configuration
for the card benefits IPH to fix the failing build.

Original change's description:
> [Benefits] Add IPH for educating users on the existence of credit card benefits.
>
> Screenshot: https://screenshot.googleplex.com/8S7ys5wrcGMk6Yq.png
> Mock: https://screenshot.googleplex.com/dhqyBGVzd9ALY3M.png
> Fixed: b/323441257
> Change-Id: I393d4dd94e5086ca8779c0107ea89d852575eae2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5379163


> Reviewed-by: Olivia Saul <jsaul@google.com>
> Commit-Queue: Justin Wells <justinleewells@google.com>
> Reviewed-by: Alexander Tekle <alexandertekle@google.com>
> Reviewed-by: Dana Fried <dfried@chromium.org>
> Reviewed-by: Jan Keitel <jkeitel@google.com>
> Cr-Commit-Position: refs/heads/main@{#1282156}

Change-Id: Ifba4226b4d9e279d75f4baac493097b3949de8cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5425156


Reviewed-by: Jan Keitel <jkeitel@google.com>
Commit-Queue: Justin Wells <justinleewells@google.com>
Reviewed-by: Alexander Tekle <alexandertekle@google.com>
Reviewed-by: Dana Fried <dfried@chromium.org>
Reviewed-by: Olivia Saul <jsaul@google.com>
Cr-Commit-Position: refs/heads/main@{#1283178}