tests: Disable tests for x86 specific examples/blueprints

- docker: Disabled because we don't have arm64 dind images
- tpm: The tss package is not compiled for arm64
- wireguard: This uses nginx:alpine which is not yet multi-arch
- docker_for_mac: Is x86 specific

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

test/cases/000_build/100_examples/010_docker/test.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # SUMMARY: Test the docker example
-# LABELS:
+# LABELS: amd64
 
 set -e
 

test/cases/000_build/100_examples/060_tpm/test.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # SUMMARY: Test the tpm example
-# LABELS:
+# LABELS: amd64
 
 set -e
 

test/cases/000_build/100_examples/070_wireguard/test.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # SUMMARY: Test the wireguard example
-# LABELS:
+# LABELS: amd64
 
 set -e
 

test/cases/000_build/200_blueprints/010_docker_for_mac/test.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # SUMMARY: Test the Docker for Mac blueprint
-# LABELS:
+# LABELS: amd64
 
 set -e