Add Equinix Metal account

We have been using sponsored Equinix Metal boxes for years (sponsorship
managed by CNCF[1]). This adds a service account[2], so we don't need to
rely on individual access.

[1] https://github.com/cncf/cluster
[2] cncf/cluster#213

Author: klausenbusk

misc/vaults/vault_equinix_metal.yml

@@ -0,0 +1,13 @@
+$ANSIBLE_VAULT;1.2;AES256;super
+62386561353232323932333032303235363130306464373632323339663533306437346563623164
+6231333262323232633838326663666164393866376534390a333239353939386563303835643934
+65626264353763633831643561316638363066386137373831356364356262353738616165323031
+3866653735373934360a626531393435333464626465643234396262363237613361626661656135
+65376331333635313061396565336336643434336261633462623961343431646665323563383330
+34616639633734356634653963623464386363663333613837353431356364643465393766323461
+35336336633433383762663132383465366230333330663736613361303735656138656233666633
+63303139616130646430346165343230323663323433343162363232663630343630376665666139
+34353830613431363164323236373962313730346237366135313862663064356666663466353339
+31633433386537656435356538646563363165613030636638333061633235653130653236646533
+61343264656333363037623831303937343430663162643637333134326661623035333734626234
+63393338373765613232