fix: add constraint and runtime check for provisioner logs size limit (#18893)

This PR sets a constraint of 1MB on the provisioner job logs written to
the database. This is consistent with the constraint we place on
workspace agent logs:
https://github.com/coder/coder/blob/4ac6be6d835dc36c242e35a26b584b784040bf28/coderd/database/dump.sql#L2030

It also adds a message printed to the front end about the provisioner
log overflow, and updates the message printed to the front end when
workspace startup logs exceed the max, as it was causing some customers
to think their startup script had failed to run.

cli/testdata/coder_list_--output_json.golden

@@ -55,7 +55,8 @@
           "template_name": "",
           "template_display_name": "",
           "template_icon": ""
-        }
+        },
+        "logs_overflowed": false
       },
       "reason": "initiator",
       "resources": [],

cli/testdata/coder_provisioner_jobs_list_--help.golden

@@ -11,7 +11,7 @@ OPTIONS:
   -O, --org string, $CODER_ORGANIZATION
           Select which organization (uuid or name) to use.
 
-  -c, --column [id|created at|started at|completed at|canceled at|error|error code|status|worker id|worker name|file id|tags|queue position|queue size|organization id|template version id|workspace build id|type|available workers|template version name|template id|template name|template display name|template icon|workspace id|workspace name|organization|queue] (default: created at,id,type,template display name,status,queue,tags)
+  -c, --column [id|created at|started at|completed at|canceled at|error|error code|status|worker id|worker name|file id|tags|queue position|queue size|organization id|template version id|workspace build id|type|available workers|template version name|template id|template name|template display name|template icon|workspace id|workspace name|logs overflowed|organization|queue] (default: created at,id,type,template display name,status,queue,tags)
           Columns to display in table output.
 
   -l, --limit int, $CODER_PROVISIONER_JOB_LIST_LIMIT (default: 50)

cli/testdata/coder_provisioner_jobs_list_--output_json.golden

@@ -26,6 +26,7 @@
       "template_display_name": "",
       "template_icon": ""
     },
+    "logs_overflowed": false,
     "organization_name": "Coder"
   },
   {
@@ -57,6 +58,7 @@
       "workspace_id": "===========[workspace ID]===========",
       "workspace_name": "test-workspace"
     },
+    "logs_overflowed": false,
     "organization_name": "Coder"
   }
 ]