Update help output to consistently call out -state and -state-out flags as legacy and related to the local backend. (#37446)

Author: SarahFrench

internal/command/apply.go

@@ -384,10 +384,15 @@ Options:
 
   -state=path            Path to read and save state (unless state-out
                          is specified). Defaults to "terraform.tfstate".
+                         Legacy option for the local backend only. See the local
+                         backend's documentation for more information.
 
   -state-out=path        Path to write state to that is different than
                          "-state". This can be used to preserve the old
                          state.
+                         Legacy option for the local backend only. See the local
+                         backend's documentation for more information.
+
                          
   -var 'foo=bar'         Set a value for one of the input variables in the root
                          module of the configuration. Use this option more than

internal/command/output.go

@@ -109,8 +109,10 @@ Usage: terraform [global options] output [options] [NAME]
 Options:
 
   -state=path      Path to the state file to read. Defaults to
-                   "terraform.tfstate". Ignored when remote 
-                   state is used.
+                   "terraform.tfstate".
+                   Legacy option for the local backend only. See
+                   the local backend's documentation for more
+                   information.
 
   -no-color        If specified, output won't contain any color.
 

internal/command/state_rm.go

@@ -190,6 +190,9 @@ Options:
 
   -state=PATH             Path to the state file to update. Defaults to the
                           current workspace state.
+                          Legacy option for the local backend only. See
+                          the local backend's documentation for more
+                          information.
 
   -ignore-remote-version  Continue even if remote and local Terraform versions
                           are incompatible. This may result in an unusable