feat: add d/host

[tenthirtyam]

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Summary of Pull Request

Adds a data source for host: data/vcf_host.

Type of Pull Request

• This is a bug fix.
• This is an enhancement or feature.
• This is a code style/formatting update.
• This is a documentation update.
• This is a refactoring update.
• This is a chore update
• This is something else.
  Please describe:

Related to Existing Issues

Ref: #200

Test and Documentation Coverage

For bug fixes or features:

• Tests have been completed.
• Documentation has been added/updated.

Running tool: /usr/local/bin/go test -timeout 30s -run ^TestAccDataSourceVcfHost$ github.com/vmware/terraform-provider-vcf/internal/provider

ok  	github.com/vmware/terraform-provider-vcf/internal/provider	(cached)

Breaking Changes?

• Yes, there are breaking changes.
• No, there are no breaking changes.

[tenthirtyam]

I've re-written it but still haveing some troubles getting the data to come through to the state.