chore: disable provenance in buildx

The builds fail to push the image to ghcr.io, because of the new default
provenance attestation with buildkit 0.11.0/buildx 0.10.0, so disabling it
for now.

Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>

Makefile

@@ -19,6 +19,7 @@ PROGRESS ?= auto
 PUSH ?= false
 DEST ?= _out
 COMMON_ARGS := --file=Pkgfile
+COMMON_ARGS += --provenance=false
 COMMON_ARGS += --progress=$(PROGRESS)
 COMMON_ARGS += --platform=$(PLATFORM)
 COMMON_ARGS += --build-arg=SOURCE_DATE_EPOCH=$(SOURCE_DATE_EPOCH)