[yaml/v2] Improved resource prefix

[EronWright]

Proposed changes

This PR changes the prefix character that is used, as per this discussion:
https://pulumi.slack.com/archives/C8R654Y6S/p1711035557620359

Tested with a few well-known manifests and seems to be a good improvement on readability.

     pulumi:pulumi:Stack                                                              issue-2881-cert-manager-dev                                            4 warn
     ├─ kubernetes:yaml/v2:ConfigGroup                                                install                                                                
 +   │  ├─ kubernetes:core/v1:Namespace                                               install:cert-manager                                        create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-cluster-view                           create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-controller-certificates                create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-edit                                   create     
 +   │  ├─ kubernetes:core/v1:ServiceAccount                                          install:cert-manager/cert-manager-webhook                   create     
 +   │  ├─ kubernetes:core/v1:ServiceAccount                                          install:cert-manager/cert-manager                           create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-view                                   create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-controller-issuers                     create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-controller-clusterissuers              create     
 +   │  ├─ kubernetes:core/v1:ServiceAccount                                          install:cert-manager/cert-manager-cainjector                create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-controller-ingress-shim                create     
 +   │  ├─ kubernetes:apiextensions.k8s.io/v1:CustomResourceDefinition                install:certificaterequests.cert-manager.io                 create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRoleBinding                 install:cert-manager-controller-certificates                create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-cainjector                             create     
 +   │  ├─ kubernetes:core/v1:Service                                                 install:cert-manager/cert-manager                           create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:Role                               install:kube-system/cert-manager-cainjector:leaderelection  create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:RoleBinding                        install:cert-manager/cert-manager-webhook:dynamic-serving   create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:Role                               install:cert-manager/cert-manager-webhook:dynamic-serving   create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-controller-certificatesigningrequests  create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRoleBinding                 install:cert-manager-controller-certificatesigningrequests  create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:Role                               install:kube-system/cert-manager:leaderelection             create     
 +   │  ├─ kubernetes:rbac.authorization.k8s.io/v1:ClusterRole                        install:cert-manager-controller-approve:cert-manager-io     create     

Related issues (optional)

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.55%. Comparing base (5b47b32) to head (30cf1df).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2900   +/-   ##
=======================================
  Coverage   27.55%   27.55%           
=======================================
  Files          53       53           
  Lines        7818     7818           
=======================================
  Hits         2154     2154           
  Misses       5485     5485           
  Partials      179      179           

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