[NFC][TableGen][analyzer] Fix some obsolete comments (#156677)

ClangSACheckersEmitter.cpp had some comments that described the
structure of its output, which would have been helpful, but became out
of sync with the code. This commit updates them to ensure they are
consistent with `CheckerRegistry.cpp`.

Author: NagyDonat

clang/utils/TableGen/ClangSACheckersEmitter.cpp

@@ -202,19 +202,22 @@ void clang::EmitClangSACheckers(const RecordKeeper &Records, raw_ostream &OS) {
 
   // Emit a package option.
   //
-  // PACKAGE_OPTION(OPTIONTYPE, PACKAGENAME, OPTIONNAME, DESCRIPTION, DEFAULT)
-  //   - OPTIONTYPE: Type of the option, whether it's integer or boolean etc.
+  // PACKAGE_OPTION(TYPE, FULLNAME, CMDFLAG, DESC, DEFAULT_VAL,
+  //                DEVELOPMENT_STATUS, IS_HIDDEN)
+  //   - TYPE: Type of the option, whether it's integer or boolean etc.
   //                 This is important for validating user input. Note that
   //                 it's a string, rather than an actual type: since we can
   //                 load checkers runtime, we can't use template hackery for
   //                 sorting this out compile-time.
-  //   - PACKAGENAME: Name of the package.
-  //   - OPTIONNAME: Name of the option.
-  //   - DESCRIPTION
-  //   - DEFAULT: The default value for this option.
+  //   - FULLNAME: Name of the package.
+  //   - CMDFLAG: Name of the option.
+  //   - DESC: The description of the option.
+  //   - DEFAULT_VAL: The default value for this option as a string.
+  //   - DEVELOPMENT_STATUS: "released" or "alpha".
+  //   - IS_HIDDEN: Boolean (true or false) marking if the option is hidden.
   //
   // The full option can be specified in the command like this:
-  //   -analyzer-config PACKAGENAME:OPTIONNAME=VALUE
+  //   -analyzer-config FULLNAME:CMDFLAG=VALUE
   OS << "\n"
         "#ifdef GET_PACKAGE_OPTIONS\n";
   for (const Record *Package : packages) {
@@ -233,12 +236,21 @@ void clang::EmitClangSACheckers(const RecordKeeper &Records, raw_ostream &OS) {
 
   // Emit checkers.
   //
-  // CHECKER(FULLNAME, CLASS, HELPTEXT)
+  // CHECKER(FULLNAME, CLASS, HELPTEXT, DOC_URI, IS_HIDDEN)
   //   - FULLNAME: The full name of the checker, including packages, e.g.:
   //               alpha.cplusplus.UninitializedObject
-  //   - CLASS: The name of the checker, with "Checker" appended, e.g.:
-  //            UninitializedObjectChecker
+  //   - CLASS: The common ending of the name of the register... and
+  //            shouldRegister... functions. Traditionally coincides with the
+  //            name of the class that implements the checker, but can be
+  //            anything else e.g. in checker families.
   //   - HELPTEXT: The description of the checker.
+  //   - DOC_URI: If the checker is NotDocumented, an empty string; if the
+  //              checker HasDocumentation, the concatenation of the fixed URL
+  //              https://clang.llvm.org/docs/analyzer/checkers.html# and
+  //              a html id derived from the full name by writing '-' instead
+  //              of '.' and lowercasing.
+  //   - IS_HIDDEN: Boolean (true or false) marking if the checker is hidden.
+
   OS << "\n"
         "#ifdef GET_CHECKERS\n"
         "\n";
@@ -300,19 +312,22 @@ void clang::EmitClangSACheckers(const RecordKeeper &Records, raw_ostream &OS) {
 
   // Emit a package option.
   //
-  // CHECKER_OPTION(OPTIONTYPE, CHECKERNAME, OPTIONNAME, DESCRIPTION, DEFAULT)
-  //   - OPTIONTYPE: Type of the option, whether it's integer or boolean etc.
+  // CHECKER_OPTION(TYPE, FULLNAME, CMDFLAG, DESC, DEFAULT_VAL,
+  //                DEVELOPMENT_STATUS, IS_HIDDEN)
+  //   - TYPE: Type of the option, whether it's integer or boolean etc.
   //                 This is important for validating user input. Note that
   //                 it's a string, rather than an actual type: since we can
   //                 load checkers runtime, we can't use template hackery for
   //                 sorting this out compile-time.
-  //   - CHECKERNAME: Name of the package.
-  //   - OPTIONNAME: Name of the option.
-  //   - DESCRIPTION
-  //   - DEFAULT: The default value for this option.
+  //   - FULLNAME: Name of the checker.
+  //   - CMDFLAG: Name of the option.
+  //   - DESC: The description of the option.
+  //   - DEFAULT_VAL: The default value for this option as a string.
+  //   - DEVELOPMENT_STATUS: "released" or "alpha".
+  //   - IS_HIDDEN: Boolean (true or false) marking if the option is hidden.
   //
   // The full option can be specified in the command like this:
-  //   -analyzer-config CHECKERNAME:OPTIONNAME=VALUE
+  //   -analyzer-config FULLNAME:CMDFLAG=VALUE
   OS << "\n"
         "#ifdef GET_CHECKER_OPTIONS\n";
   for (const Record *Checker : checkers) {