Add write-only attribute "set_wo"

[jrhouston]

Description

This PR adds a write-only version of the set attribute called set_wo. An revision attribute set_wo_revision is also added for triggering updates to the write only attribute.

Acceptance tests

• Have you added an acceptance test for the functionality being added?

❯ TF_ACC_TERRAFORM_VERSION=v1.11.0-rc1 TF_ACC=1 KUBE_CONFIG_PATH="$HOME/.kube/config" make testacc TESTARGS="-count=1 -run TestAccResourceRelease_set_wo"
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test "./helm" -v -count=1 -run TestAccResourceRelease_set_wo -timeout 10m
2025/02/24 21:41:23 Created repository package for "broken-chart"
2025/02/24 21:41:24 Created repository package for "crds-chart"
2025/02/24 21:41:24 Created repository package for "dependency-bar"
2025/02/24 21:41:24 Created repository package for "dependency-foo"
2025/02/24 21:41:24 Created repository package for "failed-deploy"
2025/02/24 21:41:25 Created repository package for "kube-version"
2025/02/24 21:41:25 Created repository package for "test-chart"
2025/02/24 21:41:25 Created repository package for "test-chart-v2"
2025/02/24 21:41:26 Created repository package for "umbrella-chart"
2025/02/24 21:41:26 Built chart repository index
=== RUN   TestAccResourceRelease_set_wo
--- PASS: TestAccResourceRelease_set_wo (9.64s)
PASS
ok      github.com/hashicorp/terraform-provider-helm/helm       13.364s

Release Note

Release note for CHANGELOG:

Add write only attribute "set_wo"

References

Community Note

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[jrhouston]

We can remove all these comments leftover from the migration in another PR – this is just formatter noise.