feat: Support looking up VM by UUID

[appilon]

Description

Support lookup by UUID on the VM datasource.

Acceptance tests

• Have you added an acceptance test for the functionality being added?
• Have you run the acceptance tests on this branch?

Output from acceptance testing:

➜ make testacc TESTARGS='-run=TestAccDataSourceVSphereVirtualMachine_' GOFLAGS="-count=1"
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test $(go list ./... |grep -v 'vendor') -v -run=TestAccDataSourceVSphereVirtualMachine_ -timeout 240m
?   	github.com/hashicorp/terraform-provider-vsphere	[no test files]
=== RUN   TestAccDataSourceVSphereVirtualMachine_basic
--- PASS: TestAccDataSourceVSphereVirtualMachine_basic (32.52s)
=== RUN   TestAccDataSourceVSphereVirtualMachine_noDatacenterAndAbsolutePath
--- PASS: TestAccDataSourceVSphereVirtualMachine_noDatacenterAndAbsolutePath (30.32s)
=== RUN   TestAccDataSourceVSphereVirtualMachine_uuid
--- PASS: TestAccDataSourceVSphereVirtualMachine_uuid (34.00s)
PASS

Release Note

Release note for CHANGELOG:

d/virtual_machine: support lookup by `uuid`

References

Closes #1612

[tenthirtyam]

LGTM, @appilon!

[github-actions]

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