Update images in Tinkerbell template

[dakraus]

What this PR does / why we need it:

Updates the images used in the Tinkerbell template and pins them down to the latest available tags.

Which issue(s) this PR fixes:

Fixes #2018

What type of PR is this?

/kind chore

Special notes for your reviewer:

• According to the README, all images are built, tagged with the Git revision, and pushed to quay.io for each commit on main. That's why I used the same tag for all actions.

Does this PR introduce a user-facing change? Then add your Release Note here:

Tinkerbell: Update the image of all actions used in the template

Documentation:

NONE

[kubermatic-bot]

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