TestTCTLTerraformCommand_AuthJoin flakiness

[ptgott]

Failure

Link(s) to logs

https://github.com/gravitational/teleport/actions/runs/10199670020/job/28217347216#step:6:1442

Relevant snippet

=== FAIL: integration TestTCTLTerraformCommand_AuthJoin (0.61s)
    tctl_terraform_env_test.go:185: 
        	Error Trace:	/__w/teleport/teleport/integration/tctl_terraform_env_test.go:185
        	Error:      	Received unexpected error:
        	            	The temporary bot failed to connect to Teleport.
        	            		running the bot
        	            			a previously registered descriptor with the same fully-qualified name as Desc{fqName: "grpc_client_started_total", help: "Total number of RPCs started on the client.", constLabels: {}, variableLabels: {grpc_type,grpc_service,grpc_method}} has different label names or a different help string
        	Test:       	TestTCTLTerraformCommand_AuthJoin

[ravicious]

v16 https://github.com/gravitational/teleport/actions/runs/10611554547/job/29411331609?pr=46011#step:6:1458

[rosstimothy]

https://github.com/gravitational/teleport/actions/runs/11350116974/job/31567811422?pr=47540

[GavinFrazar]

on v16 backport: https://github.com/gravitational/teleport/actions/runs/12794207075/job/35668849293

=== FAIL: integration TestTCTLTerraformCommand_AuthJoin (0.61s)
    tctl_terraform_env_test.go:185: 
        	Error Trace:	/__w/teleport/teleport/integration/tctl_terraform_env_test.go:185
        	Error:      	Received unexpected error:
        	            	The temporary bot failed to connect to Teleport.
        	            		running the bot
        	            			a previously registered descriptor with the same fully-qualified name as Desc{fqName: "grpc_client_started_total", help: "Total number of RPCs started on the client.", constLabels: {}, variableLabels: {grpc_type,grpc_service,grpc_method}} has different label names or a different help string
        	Test:       	TestTCTLTerraformCommand_AuthJoin

[hugoShaka]

My bad, I thought this code was not in v16 as the autobackport failed. Fix backported to v16 in #51206