istio update to 1.21.2-bb.3

Package Merge Request

Package Changes

• https://repo1.dso.mil/big-bang/product/packages/monitoring/-/blob/59.1.0-bb.1/CHANGELOG.md
• https://repo1.dso.mil/big-bang/product/packages/istio-controlplane/-/blob/1.21.2-bb.3/CHANGELOG.md
• https://repo1.dso.mil/big-bang/product/packages/authservice/-/blob/1.0.1-bb.1/CHANGELOG.md

Package MR

• big-bang/product/packages/monitoring!344 (merged)
• big-bang/product/packages/istio-controlplane!268 (merged)
• big-bang/product/packages/authservice!198 (merged)

For Issue

• Closes big-bang/product/packages/istio-controlplane#118 (closed)
• Closes big-bang/product/packages/istio-operator#58 (closed)

Upgrade Notices

n/a