Fix parsing of host variables in obfuscated procedures and functions

[SanjulaGanepola]

Changes

WRAPPED statements have an obfuscated body that may contain colons as part of the encoding. Previously running this procedure/function like this would incorrectly detect host variables which would also cause a truncation issue.

https://www.ibm.com/docs/en/i/7.6.0?topic=functions-wrap

How to test this PR

1. Generate an obfuscated function:

VALUES SYSIBMADM.WRAP('CREATE FUNCTION salary(wage DECFLOAT) RETURNS DECFLOAT 
                                RETURN wage * 40 * 52');

2. Run the function it generates:

CREATE FUNCTION SALARY ( WAGE DECFLOAT )  WRAPPED QSQ07040 aacxW8plW8VzG8pHG8VvG8Fv68Vn68Fbl8pJY8pJ1qpdW8pdW8pdW9pjaqebaqebakZuBeEd5uFkq8KJqqYsjm:1m0gyYOktd1gfJbJ0J8Pq1JRTtWhZ7eZZ7e4aa

3. Observe that the statement ran successfully.

Checklist

• have tested my change
• have created one or more test cases

[github-actions]

👋 A new build is available for this PR based on d3299cb.

• Download here.
• Read more about how to test

[forstie]

worked like an absolute champ for me, thanks!

[forstie]

works great