feat: add ability to convert a helm chart

[kentquirk]

Which problem is this PR solving?

• This gives the convert tool the ability to read config and rules out of a helm chart, convert them, and write them back to a helm chart. All comments are stripped. If that's not cool for you, you'll have to do it manually.

Short description of the changes

• Add helm command
• Load the helm chart as a map with YAML
• Extract config and run it through the config converter, then read that back into a map
• Extract rules and convert them
• Put both back into the map
• Write out the YAML again

[kentquirk]

Results of running this on the values.yaml in the helm-charts repo:

LiveReload: true
RulesConfigMapName: ""
affinity: {}
autoscaling:
    behavior:
        scaleDown:
            selectPolicy: Disabled
    enabled: false
    maxReplicas: 10
    minReplicas: 3
    targetCPUUtilizationPercentage: 75
config:
    BufferSizes:
        PeerBufferSize: 1000
        UpstreamBufferSize: 1000
    Collection:
        CacheCapacity: 1000
    Debugging:
        AdditionalErrorFields:
            - trace.span_id
    GRPCServerParameters:
        ListenAddr: 0.0.0.0:4317
    General:
        ConfigurationVersion: 2
        MinRefineryVersion: v2.0
    PeerManagement:
        IdentifierInterfaceName: eth0
    PrometheusMetrics:
        Enabled: true
        ListenAddr: 0.0.0.0:9090
    RedisPeerManagement:
        Host: '{{include "refinery.redis.fullname" .}}:6379'
    RefineryTelemetry:
        AddRuleReasonToTrace: true
        AddSpanCountToRoot: false
    StressRelief:
        ActivationLevel: 75
        DeactivationLevel: 25
    Traces:
        BatchTimeout: 1s
deploymentAnnotations: {}
environment: []
extraVolumeMounts: []
extraVolumes: []
fullnameOverride: ""
grpcIngress:
    annotations: {}
    enabled: false
    hosts:
        - host: refinery.local
          path: /
    labels: {}
    tls: []
image:
    pullPolicy: IfNotPresent
    repository: honeycombio/refinery
    tag: ""
imagePullSecrets: []
ingress:
    annotations: {}
    enabled: false
    hosts:
        - host: refinery.local
          path: /
    labels: {}
    tls: []
nameOverride: ""
nodeSelector: {}
podAnnotations: {}
podLabels: {}
podSecurityContext: {}
redis:
    affinity: {}
    annotations: {}
    enabled: true
    image:
        pullPolicy: IfNotPresent
        repository: redis
        tag: 6.2.5
    nodeSelector: {}
    tolerations: []
replicaCount: 3
resources:
    limits:
        cpu: 2000m
        memory: 2Gi
    requests:
        cpu: 500m
        memory: 500Mi
rules:
    RulesVersion: 2
    Samplers:
        __default__:
            DeterministicSampler:
                SampleRate: 1
secretProvider:
    create: false
    name: refinery
    spec: {}
securityContext: {}
service:
    annotations: {}
    grpcPort: 4317
    labels: {}
    port: 80
    type: ClusterIP
serviceAccount:
    annotations: {}
    create: true
    labels: {}
    name: ""
tolerations: []