community/swc: build with --frozen

In the context of Alpine --frozen asserts that dependencies have been downloaded by the prepare stage. This is already the case for most other packages.

assigned to @jirutka

added 167 commits

• 0bbbfacb...5c7c2b83 - 166 commits from branch alpine:master
• 726d8be0 - community/swc: build with --frozen

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merged