Fix CGO-less TBot Build (#52505) (#52562)

* Fix CGOLess tbot build

* Remove buildmode=pie for CGO_ENABLED=0 builds

Makefile

@@ -366,9 +366,10 @@ $(BUILDDIR)/tsh:
 
 .PHONY: $(BUILDDIR)/tbot
 # tbot is CGO-less by default except on Windows because lib/client/terminal/ wants CGO on this OS
-$(BUILDDIR)/tbot: TBOT_CGO_FLAGS ?= $(if $(filter windows,$(OS)),$(CGOFLAG))
+# We force cgo to be disabled, else the compiler might decide to enable it.
+$(BUILDDIR)/tbot: TBOT_CGO_FLAGS ?= $(if $(filter windows,$(OS)),$(CGOFLAG),CGO_ENABLED=0)
 # Build mode pie requires CGO
-$(BUILDDIR)/tbot: BUILDFLAGS_TBOT += $(if $(TBOT_CGO_FLAGS), -buildmode=pie)
+$(BUILDDIR)/tbot: BUILDFLAGS_TBOT += $(if $(findstring CGO_ENABLED=1,$(TBOT_CGO_FLAGS)), -buildmode=pie)
 $(BUILDDIR)/tbot:
 	GOOS=$(OS) GOARCH=$(ARCH) $(TBOT_CGO_FLAGS) go build -tags "$(FIPS_TAG)" -o $(BUILDDIR)/tbot $(BUILDFLAGS_TBOT) $(TOOLS_LDFLAGS) ./tool/tbot
 

integrations/teleport-spacelift-runner/Makefile

@@ -14,7 +14,7 @@ include ../../build.assets/images.mk
 .PHONY: docker-build
 docker-build:
 	docker buildx build --platform="$(OS)/$(ARCH)" \
-		--build-arg BUILDBOX=$(BUILDBOX_CENTOS7) \
+		--build-arg BUILDBOX=$(BUILDBOX_CENTOS7_NOARCH) \
 		--build-arg BASE_IMAGE=$(BASE_IMAGE) \
 		--load \
 		-f ./Dockerfile \