chore: remove loki peerauth exception (#1106)

## Description

Upstream [grafana
docs](https://grafana.com/docs/loki/latest/setup/install/istio/) do not
indicate that this is necessary, likely it was used in the past when
services did not have the correct appProtocol. This may be causing
issues with our Loki clustering, but overall removing it improves our
security posture.

I also removed the action used during our cutover from promtail ->
vector.

## Related Issue

N/A

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Other (security config, docs update, etc)

## Steps to Validate

Recommend deploying Loki with an install and upgrade and validating
functionality:
```console
# Deploy slim-dev from last release
uds deploy oci://ghcr.io/defenseunicorns/packages/uds/bundles/k3d-core-slim-dev:0.32.1 --confirm
# (optional) Deploy monitoring layer for visualizing/querying loki easier
uds zarf p deploy oci://ghcr.io/defenseunicorns/packages/uds/core-monitoring:0.32.1-upstream --confirm
# (for testing upgrade) Deploy logging layer from last release
uds zarf p deploy oci://ghcr.io/defenseunicorns/packages/uds/core-logging:0.32.1-upstream --confirm
# Deploy logging from this branch (this includes an upgrade to the Loki version from main)
uds run test:single-layer --set layer=logging
# (optional) run the e2e tests for grafana which test the loki datasource
uds run -f src/grafana/tasks.yaml e2e-test --set FULL_CORE=true
```

## Checklist before merging

- [x] Test, docs, adr added or updated as needed
- [x] [Contributor
Guide](https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md)
followed

src/vector/common/zarf.yaml

@@ -24,12 +24,6 @@ components:
           - ../values/values.yaml
     actions:
       onDeploy:
-        before:
-          - description: Remove Promtail Components if necessary
-            mute: true
-            cmd: |
-              ./zarf package remove core --components promtail --confirm || true # Ensure this doesn't error on installs and upgrades when Promtail no longer exists
-              ./zarf tools kubectl delete ns promtail || true # Ensure this doesn't error on installs and upgrades when Promtail no longer exists
         after:
           - description: Validate Vector Package
             maxTotalSeconds: 300