feature: update ABM version to 1.13.1

[Shabirmean]

Fixes N/A

Description

• Updating to latest version of ABM in prep for release and terraform version update

Change summary

• Update references to ABM version in the ABM on GCE samples

Related PRs/Issues

• There is an additional file deleted; this is basically because that file was renamed to something else in PR#459 to have a better naming scheme; also references to this file was removed in cl/485447870

[snippet-bot]

Here is the summary of changes.

You are about to delete 10 region tags.

• anthos-bm-gcp-bash/setup_and_install_abm.sh:20, tag anthos_bm_gcp_bash_create_sa
• anthos-bm-gcp-bash/setup_and_install_abm.sh:30, tag anthos_bm_gcp_bash_enable_api
• anthos-bm-gcp-bash/setup_and_install_abm.sh:50, tag anthos_bm_gcp_bash_add_iam_role
• anthos-bm-gcp-bash/setup_and_install_abm.sh:90, tag anthos_bm_gcp_bash_vms_array
• anthos-bm-gcp-bash/setup_and_install_abm.sh:106, tag anthos_bm_gcp_bash_create_vm
• anthos-bm-gcp-bash/setup_and_install_abm.sh:129, tag anthos_bm_gcp_bash_check_ssh
• anthos-bm-gcp-bash/setup_and_install_abm.sh:144, tag anthos_bm_gcp_bash_add_vxlan
• anthos-bm-gcp-bash/setup_and_install_abm.sh:171, tag anthos_bm_gcp_bash_init_vm
• anthos-bm-gcp-bash/setup_and_install_abm.sh:200, tag anthos_bm_gcp_bash_add_ssh_keys
• anthos-bm-gcp-bash/setup_and_install_abm.sh:215, tag anthos_bm_gcp_bash_install_abm

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