Update dependency components/opentofu to v0.19.0

This MR contains the following updates:

Package	Type	Update	Change
components/opentofu	repository	minor	0.17.0 -> 0.19.0

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Release Notes

components/opentofu (components/opentofu)

v0.19.0

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Added (1 change)

• Document best practice for lockfile handling (merge request)

Fixed (1 change)

• Mock CI_SERVER_HOST predefined env variable for unit test (merge request)

v0.18.0

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No changes.

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