Fix Makefile's use of ARCH to rename x86_64 to amd64, fix kind-deploy/undeploy target

[squizzi]

'make clusterawsadm' uses the ARCH var to craft a URL for downloading the clusterawsadm binary but 'uname -m' outputs the arch as 'x86_64' while the binary versions for download use 'amd64', this modifies the arch outputted by 'uname -m' to use 'amd64' so that the curl does not fail with 'Not Found'.

Testing

Before make clusterawsadm curled a URL that does not exist and outputted a bin file with Not Found:

$ make clusterawsadm
$ curl -sL https://github.com/kubernetes-sigs/cluster-api-provider-aws/releases/download/v2.5.2/clusterawsadm_v2.5.2_linux_x86_64 -o /home/squizzi/go/src/github.com/Mirantis/hmc/bin/clusterawsadm
chmod +x /home/squizzi/go/src/github.com/Mirantis/hmc/bin/clusterawsadm

$ curl -sL https://github.com/kubernetes-sigs/cluster-api-provider-aws/releases/download/v2.5.2/clusterawsadm_v2.5.2_linux_x86_64    
Not Found%                                                        

Now, the make works as intended on x86_64 arch systems:

$ make clusterawsadm 
curl -sL https://github.com/kubernetes-sigs/cluster-api-provider-aws/releases/download/v2.5.2/clusterawsadm_v2.5.2_linux_amd64 -o /home/squizzi/go/src/github.com/Mirantis/hmc/bin/clusterawsadm
chmod +x /home/squizzi/go/src/github.com/Mirantis/hmc/bin/clusterawsadm

...

$ ./bin/clusterawsadm version  
clusterawsadm version: &version.Info{Major:"2", Minor:"5", GitVersion:"2.5.2", GitCommit:"5383d351296ff753f30c861c45275ab83069d395", GitTreeState:"clean", BuildDate:"2024-06-17T16:24:51Z", GoVersion:"go1.21.11", AwsSdkVersion:"v1.51.17", Compiler:"gc", Platform:"linux/amd64"}

[squizzi]

Added another Makefile fix which fixes kind-deploy/kind-undeploy, they were referencing kind but not using the version that gets installed into ./bin