Add PULUMI_K8S_ENABLE_PATCH_FORCE env var support

[lblackstone]

Proposed changes

PULUMI_K8S_ENABLE_PATCH_FORCE="true" pulumi up --target="**DeploymentPatch::example"
Previewing update (dev)

View Live: https://app.pulumi.com/lblackstone/pulumi-k8s-test/dev/previews/2fc3fde8-3420-4e39-ae23-196f6bfd4164

     Type                                   Name                 Plan
     pulumi:pulumi:Stack                    pulumi-k8s-test-dev
 +   └─ kubernetes:apps/v1:DeploymentPatch  example              create


Resources:
    + 1 to create
    3 unchanged

Do you want to perform this update? yes
Updating (dev)

View Live: https://app.pulumi.com/lblackstone/pulumi-k8s-test/dev/updates/369

     Type                                   Name                 Status
     pulumi:pulumi:Stack                    pulumi-k8s-test-dev
 +   └─ kubernetes:apps/v1:DeploymentPatch  example              created (0.23s)


Resources:
    + 1 created
    3 unchanged

Duration: 1s

Fix #2259

Related issues (optional)

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[justinvp]

Nit: Might be nice if the value could be any case or 1 (i.e. "truthy"), but I wouldn't block on it, this is fine.

[lblackstone]

Yep, I followed precedence for other env vars on this provider, but it would be a nice thing to change. I'll open an issue to follow up on that.

[lblackstone]

#2263