feat(coderd/database): add api_version to provisioner_daemons table (#11204)

Adds column api_version to the provisioner_daemons table.
This is distinct from the coderd version, and is used to handle breaking changes in the provisioner daemon API.

coderd/database/migrations/000179_provisionerdaemon_add_apiversion.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE ONLY provisioner_daemons
+		DROP COLUMN api_version;

coderd/database/migrations/000179_provisionerdaemon_add_apiversion.up.sql

@@ -0,0 +1,3 @@
+ALTER TABLE ONLY provisioner_daemons
+    ADD COLUMN api_version text NOT NULL DEFAULT '1.0';
+COMMENT ON COLUMN provisioner_daemons.api_version IS 'The API version of the provisioner daemon';