Config LoadBalancer for frontendProxy

[rcastley]

Environment:
OS: Multipass on Mac running Ubuntu 22.04 LTS
K8s: K3s v1.25.6+k3s1

Using serviceType yields the following error:

Error: UPGRADE FAILED: values don't meet the specifications of the schema(s) in the following chart(s):
opentelemetry-demo:
- components.frontendProxy: Additional property serviceType is not allowed

Using the following in values file works:

components:
  frontendProxy:
    service:
      type: LoadBalancer

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: rcastley / name: Robert Castley (09285ec)

[cartermp]

Hello @rcastley, thanks for the PR. Can you sign the CLA? We can review then.

[rcastley]

Hi, just waiting upon approval from management at Splunk :-)

[cartermp]

@rcastley thanks! Unfortunately we churned the docs here and the file name is different. Would you like to still finish this up?

[chalin]

@rcastley - FYI, rebasing should be all you need to do to bring your PR up-to-date.