Update ArgoCD to v2.5.0

Relates to https://repo1.dso.mil/platform-one/big-bang/apps/core/argocd/-/issues/62

This MR consists of the following changes:

• Move the CRDs from chart/crds to chart/templates/crds to be managed by Helm to match upstream

• Move the argocd-iam-secret.yaml template to chart/templates/bigbang directory to help prevent accidental deletion after kpt upgrade conflicts

• Update from upstream chart version 5.5.7 to 5.13.0

• Update ArgoCD version from v2.4.12 to v2.5.0

• Update documentation for configuring SSO login with Keycloak in Big Bang

• Update troubleshooting documentation with updated argocd cli references and argocd-server TLS configuration information

• Update upgrade documentation with section about Big Bang chart additions

• See the upstream upgrade documentation for more information

This MR contains the following updates:

Package	Update	Change
ironbank/big-bang/argocd	minor	v2.4.12 -> v2.5.0
registry1.dso.mil/ironbank/big-bang/argocd	minor	v2.4.12 -> v2.5.0

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