Lock down plan artifacts access

Closes #29

See merge request components/opentofu!80

This change set locks down the access to the plan artifacts to `none` by
default. This can be changed by setting the `artifcats_access` or
`plan_artifacts_access` input.

Changelog: changed

Closes https://gitlab.com/components/opentofu/-/issues/29

Introduce destroy input for plan job

See merge request components/opentofu!79

Do not use CI_PROJECT_PATH variable in README

See merge request components/opentofu!78

Remove note about terraform-images heritage

See merge request components/opentofu!77

Use bats instead of job based tests

See merge request components/opentofu!76

Changelog: other

Auto URL-encode state name

See merge request components/opentofu!75

This change set implements auto url-encoding for the state name when
it's used as a URL.
This allows to seamlessly define a state name like `production/aws`.

The feature is behind a feature flag that can be disabled.
You can define the `TF_FF_AUTO_URLENCODE_STATE_NAME` variable as `false`
in your pipeline configuration to disable this behavior.

Changelog: added

Remove backporting to CI/CD templates

Closes #43

See merge request components/opentofu!71

chore(deps): update alpine docker tag to v3.20.0

See merge request components/opentofu!74

Remove /tmp after OpenTofu installation in image

Closes #45

See merge request components/opentofu!73

Only install openssh-client but not openssh-server

See merge request components/opentofu!72

Changelog: changed

Closes #45

This change set solely installs openssh-client instead of openssh which
also installs openssh-server.
The before and after diff of `apk list` looks like the following:

```
diff before.apk-list after.apk-list
33d32
< openssh-9.6_p1-r0 aarch64 {openssh} (SSH-OpenSSH) [installed]
37,39d35
< openssh-server-9.6_p1-r0 aarch64 {openssh} (SSH-OpenSSH) [installed]
< openssh-server-common-9.6_p1-r0 aarch64 {openssh} (SSH-OpenSSH) [installed]
< openssh-sftp-server-9.6_p1-r0 aarch64 {openssh} (SSH-OpenSSH) [installed]
```

The reducation in size is neglectible with 1MB from 208MB to 207MB.

Changelog: removed

Refs #44

This change set removes the machinery to backport the CI/CD component to
CI/CD templates.

Closes https://gitlab.com/components/opentofu/-/issues/43

chore(deps): update docker docker tag to v26.1.3

See merge request components/opentofu!68

Support skipping tests in CI for self-managed

Closes #40

See merge request components/opentofu!67

This change set allows to disable the unit and integration tests in the
pipeline intended for GitLab self-managed to save runner resources.

Changelog: added

Closes https://gitlab.com/components/opentofu/-/issues/40

Mock CI_SERVER_HOST predefined env variable for unit test

See merge request components/opentofu!65

Improve self-managed mirror docs in README

See merge request components/opentofu!66

This change set mocks the CI_SERVER_HOST predefined environment variable
with a deterministic value in the unit tests.
This is necessary so that the unit tests run on self-managed.

Changelog: fixed