opentofu: update to 1.12.1.

[al20ov]

Testing the changes

• I tested the changes in this PR: YES

Local build testing

• I built this PR locally for my native architecture, x86_64-glibc
• I built this PR locally for these architectures (if supported. mark crossbuilds):
  • x86_64-musl
  • i686

Two more tests were added with the same issue that required the make_check_args="-skip=TestPrimaryChdirOption" previously (tf plans generated with an older or -dev version of tofu) which resulted in these errors:

--- FAIL: TestPrimaryChdirOption (0.08s)
    primary_test.go:192: failed to read plan file: plan file was created by OpenTofu or Terraform 1.12.1-dev, but this is 1.12.1; plan files cannot be transferred between different versions of OpenTofu / Terraform
FAIL

--- FAIL: TestStateViews (0.01s)
    --- FAIL: TestStateViews/showResourceState_with_proper_state (0.00s)
        state_test.go:676: unexpected output on line 0:
              map[string]any{
              	"format_version":    string("1.0"),
            - 	"terraform_version": string("1.12.0"),
            + 	"terraform_version": string("1.12.1"),
              	"values":            map[string]any{"root_module": map[string]any{"resources": []any{map[string]any{"address": string("test_resource.foo"), "mode": string("managed"), "name": string("foo"), "provider_name": string("registry.opentofu.org/hashicorp/test"), ...}}}},
              }
        state_test.go:700: unexpected output on line 0:
              map[string]any{
              	"format_version":    string("1.0"),
            - 	"terraform_version": string("1.12.0"),
            + 	"terraform_version": string("1.12.1"),
              	"values":            map[string]any{"root_module": map[string]any{"resources": []any{map[string]any{"address": string("test_resource.foo"), "mode": string("managed"), "name": string("foo"), "provider_name": string("registry.opentofu.org/hashicorp/test"), ...}}}},
              }
FAIL

--- FAIL: TestEphemeralWorkflowAndOutput (4.89s)
    --- FAIL: TestEphemeralWorkflowAndOutput/proto_version_6 (2.40s)
        primary_test.go:333: failed to read the plan file: plan file was created by OpenTofu or Terraform 1.12.1-dev, but this is 1.12.1; plan files cannot be transferred between different versions of OpenTofu / Terraform
    --- FAIL: TestEphemeralWorkflowAndOutput/proto_version_5 (2.48s)
        primary_test.go:333: failed to read the plan file: plan file was created by OpenTofu or Terraform 1.12.1-dev, but this is 1.12.1; plan files cannot be transferred between different versions of OpenTofu / Terraform
FAIL

So it was either make_check_args="-skip=TestPrimaryChdirOption|TestStateViews|TestEphemeralWorkflowAndOutput" or patching out the tf plan version check to get these tests to run.

@Emru1