Add variable to enable/disable istio dashboard check within grafana

Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/monitoring/-/issues/56

assigned to @blloyd

added 17 commits

• d686f273...ad86e4ee - 16 commits from branch master
• aae5df8f - Merge branch 'master' into 'grafana_istio_dash_check'

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added 78 commits

• aae5df8f...a74f9010 - 77 commits from branch master
• bcc5e6c0 - Merge branch 'master' into 'grafana_istio_dash_check'

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added 2 commits

• 68acd2dd - Add variable to enable/disable istio dashboard check within grafana
• c683d466 - Merge branch 'grafana_istio_dash_check' of...

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added 1 commit

• 6beef07f - Bump monitoring version

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merged

mentioned in commit 1112fe7b

changed milestone to %1.26.0

added monitoring label