Backport of backend/remote: No version check for operations into v0.14

[teamterraform]

Backport

This PR is auto-generated from #27319 to be assessed for backporting due to the inclusion of the label 0.14-backport.

The below text is copied from the body of the original PR.

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Terraform remote version conflicts are not a concern for operations. We are in one of three states:

• Running remotely, in which case the local version is irrelevant;
• Workspace configured for local operations, in which case the remote version is meaningless;
• Forcing local operations with a remote backend, which should only happen in the Terraform Cloud worker, in which case the Terraform versions by definition match.

This commit therefore disables the version check for operations (plan and apply), which has the consequence of disabling it in Terraform Cloud and Enterprise runs. In turn this enables Terraform Enterprise runs with bundles which have a version that doesn't exactly match the bundled Terraform version.

Intended for back-port to 0.14 for an upcoming release.

[codecov]

Codecov Report

Merging #27400 (e9429ac) into v0.14 (5389db2) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Impacted Files	Coverage Δ
backend/remote/backend.go	62.67% <100.00%> (-0.15%)	⬇️
terraform/evaluate.go	53.30% <0.00%> (+0.41%)	⬆️
dag/marshal.go	54.79% <0.00%> (+1.36%)	⬆️
terraform/node_resource_plan.go	97.19% <0.00%> (+1.86%)	⬆️

[ghost]

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