deps: update dependency opentofu/opentofu to v1.9.1 (#914)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [opentofu/opentofu](https://redirect.github.com/opentofu/opentofu) |
patch | `v1.9.0` -> `v1.9.1` |

---

### Release Notes

<details>
<summary>opentofu/opentofu (opentofu/opentofu)</summary>

###
[`v1.9.1`](https://redirect.github.com/opentofu/opentofu/releases/tag/v1.9.1)

[Compare
Source](https://redirect.github.com/opentofu/opentofu/compare/v1.9.0...v1.9.1)

BUG FIXES:

- Provider used in import is correctly identified.
([#&#8203;2336](https://redirect.github.com/opentofu/opentofu/pull/2336))
- `plantimestamp()` now returns unknown value during validation
([#&#8203;2397](https://redirect.github.com/opentofu/opentofu/issues/2397))
- Syntax error in the `required_providers` block does not panic anymore,
but yields "syntax error"
([2344](https://redirect.github.com/opentofu/opentofu/issues/2344))
- Fix the error message when default value of a complex variable is
containing a wrong type
([2394](https://redirect.github.com/opentofu/opentofu/issues/2394))
- Changing Go version to 1.22.11 in order to fix
[CVE-2024-45336](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-45336)
and
[CVE-2024-45341](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-45341)
([#&#8203;2438](https://redirect.github.com/opentofu/opentofu/pull/2438))
- Fix the way OpenTofu downloads a module that is sourced from a GitHub
branch containing slashes in the name.
([2396](https://redirect.github.com/opentofu/opentofu/issues/2396))
- Changing Go version to 1.22.12 in order to fix
[CVE-2025-22866](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-22866)
and
[CVE-2024-45341](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-45341)
([#&#8203;2438](https://redirect.github.com/opentofu/opentofu/pull/2438))

**Full Changelog**:
opentofu/opentofu@v1.9.0...v1.9.1

</details>

---

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.github/workflows/test_e2e.yml

@@ -43,7 +43,7 @@ jobs:
 
       - uses: opentofu/setup-opentofu@v1
         with:
-          tofu_version: v1.9.0 # renovate: datasource=github-releases depName=opentofu/opentofu
+          tofu_version: v1.9.1 # renovate: datasource=github-releases depName=opentofu/opentofu
           tofu_wrapper: false
 
       - uses: yokawasa/action-setup-kube-tools@v0.11.2
@@ -150,7 +150,7 @@ jobs:
 
       - uses: opentofu/setup-opentofu@v1
         with:
-          tofu_version: v1.9.0 # renovate: datasource=github-releases depName=opentofu/opentofu
+          tofu_version: v1.9.1 # renovate: datasource=github-releases depName=opentofu/opentofu
           tofu_wrapper: false
 
       - uses: yokawasa/action-setup-kube-tools@v0.11.2