feat: update grafana operator

[rlanore]

What does this PR do?

Update grafana operator to 5.5.2 release.

Take care of i had to use main branch to aws-observability-accelerator repo since we haven't tag tu support this operator version. here

Motivation

Permit to use configMapRef into grafana dashboard manifest

see #246

More

• Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)
• Yes, I ran pre-commit run -a with this PR

For Moderators

• E2E Test successfully complete before merge?

[bonclay7]

Thanks for the PR @rlanore, can we use this tag instead of main https://github.com/aws-observability/aws-observability-accelerator/releases/tag/v0.3.1

[bonclay7]

Let's continue to use tags. I've released a new tag that include your changes https://github.com/aws-observability/aws-observability-accelerator/releases/tag/v0.3.1

[rlanore]

hi,
No problem i can change to still use tag.I pushed this change just now
Tested on my account every kustomization reconciliated

grafana-dashboards-adothealth                     True                 Applied revision: v0.3.1@sha1:b39123f0bd441015ff23bb342fdb63a6b51b0b2e
... ...

[bonclay7]

TY!