Add MISRA C mandatory query suite

Author: lcartey

c/misra/src/codeql-suites/misra-c-mandatory.qls

@@ -0,0 +1,12 @@
+- description: MISRA C 2012 (Advisory)
+- qlpack: codeql/misra-c-coding-standards
+- include:
+    kind:
+    - problem
+    - path-problem
+    tags contain:
+    - external/misra/obligation/mandatory
+- exclude:
+    tags contain:
+    - external/misra/audit
+    - external/misra/default-disabled

change_notes/2024-10-03-misra-c-query-suites.md

@@ -3,7 +3,7 @@
      - The `misra-c-default.qls` suite has been specified as the default for the pack, and will include our most up-to-date coverage for MISRA C.
    - A new query suite `misra-c-2012-third-edition-with-amendment-2.qls` has been created to represent our previous MISRA C coverage. Note: this query suite will run the rules that were present in MISRA C 2012, Third Edition, First Revision and Amendment 2. The interpretation of those
    rules may be updated to reflect changes in more recent MISRA standards.
-   - A pair of new query suites, `misra-c-required.qls` and `misra-c-advisory.qls`, have been added to enable running only the required or advisory queries.
+   - Three new query suites, `misra-c-mandatory.qls`, `misra-c-required.qls` and `misra-c-advisory.qls`, have been added to enable running mandatory, required or advisory queries.
  - The following query suites have been added or modified for MISRA C++:
    - A new query suite has been created `misra-cpp-default.qls` to avoid confusion with the MISRA C query suites. The `misra-default.qls` suite has been deprecated, and will be removed in a future releases, and is replaced by the `misra-cpp-default.qls` suite.
      - The `misra-cpp-default.qls` suite has been specified as the default for the pack, and will include our most up-to-date coverage for MISRA C.