Add format_context and complete output_format for RPC call to format (#310)

This will help SAF-1696

test plan:
see related PR in semgrep


- [x] I ran `make setup && make` to update the generated code after
editing a `.atd` file (TODO: have a CI check)
- [x] I made sure we're still backward compatible with old versions of
the CLI.
For example, the Semgrep backend need to still be able to *consume* data
generated
	  by Semgrep 1.17.0.
See
https://atd.readthedocs.io/en/latest/atdgen-tutorial.html#smooth-protocol-upgrades

Author: aryx

semgrep_output_v1.atd

@@ -1756,6 +1756,10 @@ type ci_env = (string * string) list
 
 (* See src/rpc/README.txt in the Semgrep repository. *)
 
+(* ----------------------------- *)
+(* argument call types *)
+(* ----------------------------- *)
+
 (* coupling: Textedit.ml *)
 type edit
     <python decorator="dataclass(frozen=True)"> = {
@@ -1821,11 +1825,32 @@ type sarif_format_return
   format_time_seconds: float;
 }
 
-(* TODO: merge with src/osemgrep/reporting/Output_format.ml *)
-type output_format = [
-  | Vim
+type output_format
+  <ocaml attr="deriving show">
+  <python decorator="dataclass(frozen=True)">   = [
+  | Text
+  | Json
   | Emacs
-]
+  | Vim
+  | Sarif
+  | Gitlab_sast
+  | Gitlab_secrets
+  | Junit_xml
+  (* osemgrep-only *)
+  | Files_with_matches
+  (* used to disable the final display of match results because
+   * we displayed them incrementally instead
+   *)
+  | Incremental
+] <ocaml repr="classic">
+
+type format_context
+     <ocaml attr="deriving show">
+     <python decorator="dataclass(frozen=True)">   = {
+   is_ci_invocation: bool;
+   is_logged_in: bool;
+   is_using_registry: bool;
+}
 
 type manifest_kind 
   <ocaml attr="deriving show, eq, yojson">
@@ -1891,12 +1916,16 @@ type dump_rule_partitions_params = {
   output_dir: fpath;
 }
 
+(* ----------------------------- *)
+(* The call *)
+(* ----------------------------- *)
+
 type function_call
     <python decorator="dataclass(frozen=True)"> = [
   | CallContributions
   | CallApplyFixes of apply_fixes_params
   | CallSarifFormat of sarif_format_params
-  | CallFormatter of (output_format * cli_output)
+  | CallFormatter of (output_format * format_context * cli_output)
   (* NOTE: fpath is most likely a temporary file that contains all the rules in
      JSON format. In the future, we could send the rules via a big string through
      the RPC pipe.
@@ -1906,6 +1935,10 @@ type function_call
   | CallDumpRulePartitions of dump_rule_partitions_params
 ]
 
+(* ----------------------------- *)
+(* The return *)
+(* ----------------------------- *)
+
 type function_return
     <python decorator="dataclass(frozen=True)"> = [
   | RetError of string
@@ -1918,6 +1951,10 @@ type function_return
   | RetDumpRulePartitions of bool
 ]
 
+(*****************************************************************************)
+(* Misc *)
+(*****************************************************************************)
+
 (* ----------------------------- *)
 (* Partial scans. Experimental and for internal use only. *)
 (* ----------------------------- *)