Upgrade prometheus addon chart

[branden]

This upgrades to the renamed chart, kube-prometheus-stack.

What type of PR is this?

Chore

What this PR does/ why we need it:

This upgrades the Prometheus addon to the latest available version of its chart, now named kube-prometheus-stack.

Which issue(s) this PR fixes:

• https://jira.d2iq.com/browse/D2IQ-75500

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[prometheus] Upgrades to the latest version of the kube-prometheus-stack chart. This includes upgrades for multiple applications. The changes listed should not be disruptive to the default addon configuration.

prometheus 2.26.0:
https://github.com/prometheus/prometheus/releases/tag/v2.22.2
https://github.com/prometheus/prometheus/releases/tag/v2.23.0
https://github.com/prometheus/prometheus/releases/tag/v2.24.0
https://github.com/prometheus/prometheus/releases/tag/v2.24.1
https://github.com/prometheus/prometheus/releases/tag/v2.25.0
https://github.com/prometheus/prometheus/releases/tag/v2.25.1
https://github.com/prometheus/prometheus/releases/tag/v2.25.2
https://github.com/prometheus/prometheus/releases/tag/v2.26.0

grafana 7.5.3:
https://github.com/grafana/grafana/releases/tag/v7.3.6
https://github.com/grafana/grafana/releases/tag/v7.3.7
https://github.com/grafana/grafana/releases/tag/v7.3.10
https://github.com/grafana/grafana/releases/tag/v7.4.0
https://github.com/grafana/grafana/releases/tag/v7.4.1
https://github.com/grafana/grafana/releases/tag/v7.4.2
https://github.com/grafana/grafana/releases/tag/v7.4.3
https://github.com/grafana/grafana/releases/tag/v7.4.5
https://github.com/grafana/grafana/releases/tag/v7.5.0
https://github.com/grafana/grafana/releases/tag/v7.5.1
https://github.com/grafana/grafana/releases/tag/v7.5.2
https://github.com/grafana/grafana/releases/tag/v7.5.3

prometheus-operator 0.47.0:
https://github.com/prometheus-operator/prometheus-operator/releases/tag/v0.44.1
https://github.com/prometheus-operator/prometheus-operator/releases/tag/v0.45.0
https://github.com/prometheus-operator/prometheus-operator/releases/tag/v0.46.0
https://github.com/prometheus-operator/prometheus-operator/releases/tag/v0.47.0

Checklist

• The commit message explains the changes and why are needed.
• The code builds and passes lint/style checks locally.
• The relevant subset of integration tests pass locally.
• The core changes are covered by tests.
• The documentation is updated where needed.

[d2iq-mergebot]

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@mesosphere-mergebot backport  

[alejandroEsc]

lgtm

[branden]

@mesosphere-mergebot backport release/3 release/4

[d2iq-mergebot]

Backport PR for release/3: #1131
Conflicts present in files:

addons/prometheus/prometheus.yaml
addons/prometheusadapter/prometheusadapter.yaml

Backport PR for release/4: #1132