Add Global Router terraform examples

What's Changed

• Add Openstack provider source location by @Koodt in #20
• Add routing example by @Koodt in #21
• Rewrite Terraform configuration files to a canonical format and style by @Koodt in #22
• Rewrite load balancer example by @Koodt in #23
• Add dbaas examples by @f4rx in #26
• update dbaas examples for v3.6.2 by @f4rx in #27
• Query returned more than one result fix by @Koodt in #28
• Refactor VPC loadbalancer example by @Koodt in #29
• Added dns_nameservers to vpc nat module by @Koodt in #30
• MODULES: flavor lifecycle fix by @Koodt in #31
• Speeding up the creation of a pool of lb members by @gadzhet in #32
• LB: Barbican container and https rule removes by @Koodt in #33
• Extra arguments for mks_nodegroup according to new abilities by @TawR1024 in #34
• new example with server group by @makonakro13 in #36
• Examples with server_remote_root_disk module fix by @Koodt in #37
• Add new example for mks by @manegspb in #38
• Preemtible server example add by @Koodt in #41
• Add DBaaS Redis example by @Gogen120 in #39
• Added shared filesystem example by @idegree in #42
• Remove auto_quotas in resource project_1 by @manegspb in #43
• Add example with preemtible server with GPU by @Koodt in #44
• Update vars.tf by @isaevdo in #45
• Update vars.tf by @isaevdo in #47
• Update main.tf by @isaevdo in #46
• Update main.tf by @isaevdo in #48
• Add FWaaS _V2 example by @Koodt in #49
• Update README.md by @Koodt in #50
• Update docs with keystone auth by @TruePack in #51
• Update vars.tf: new VM parameters by @isaevdo in #52
• Fix examples params by @TruePack in #54
• Update vars.tf by @isaevdo in #55
• Change VPC to IAM by @icerzack in #56
• LoadBalancer examples update by @Koodt in #58
• Update auth_url and versions by @Koodt in #59
• Add user data and nvidia device plugin to examples by @yaroslaver in #60
• Add remote volume with custom iops example by @idegree in #62
• Add audit logs to examples by @ormequ in #61
• Use Cloud instead VPC by @Koodt in #63
• Add networking security groups example and modules by @Koodt in #64
• Fix networking security group readme by @Koodt in #65
• Add allowed address pairs by @Koodt in #66
• Global Router terraform examples by @skraynev in #67

New Contributors

• @f4rx made their first contribution in #26
• @gadzhet made their first contribution in #32
• @TawR1024 made their first contribution in #34
• @makonakro13 made their first contribution in #36
• @manegspb made their first contribution in #38
• @Gogen120 made their first contribution in #39
• @idegree made their first contribution in #42
• @isaevdo made their first contribution in #45
• @TruePack made their first contribution in #51
• @icerzack made their first contribution in #56
• @yaroslaver made their first contribution in #60
• @ormequ made their first contribution in #61
• @skraynev made their first contribution in #67

Full Changelog: v2.1.0...v3.0.0