fix: allow standalone node without pic clause for the supported usage…

[ap891843]

… clause

allow standalone node without pic clause for the following usage clause:
INDEX, POINTER, POINTER_32, PROCEDURE_POINTER, FUNCTION_POINTER, OBJECT_REFERENCE, COMPUTATIONAL_1, COMPUTATIONAL_2, COMP_1, COMP_2

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test below code do not throw diagnostics as it compiles fine ( also IBM doc says the same)

       IDENTIFICATION DIVISION.
       PROGRAM-ID. TEST1.
       DATA DIVISION.
       WORKING-STORAGE SECTION.
       01  PARENT USAGE POINTER-32.
       01  PARENT2 USAGE POINTER.
       01  PARENT3 USAGE INDEX.
       01  PARENT4 USAGE COMP-1.
       01  PARENT5 USAGE COMPUTATIONAL-1.
       01  PARENT6 USAGE COMPUTATIONAL-2.
       01  PARENT7 USAGE COMP-2.
       01  PARENT8 USAGE PROCEDURE-POINTER.
       01  PARENT9 USAGE FUNCTION-POINTER.
       01  PARENT10 USAGE OBJECT REFERENCE.
       PROCEDURE DIVISION.

Checklist:

• Each of my commits contains one meaningful change
• I have performed rebase of my branch on top of the development
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings