Rule blocked: CORERULES-1691

- Attach test dataset files that can be used to test the new feature
- Replace the "###" in the issue title with the primary JIRA ticket number for the rule.
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**Links to related JIRA Tickets**
- https://jira.cdisc.org/projects/CORERULES/issues/CORERULES-1691
see also ADaM check 5 & 6 for which have similar requirements
- https://jira.cdisc.org/projects/CORERULES/issues/CORERULES-1636
- https://jira.cdisc.org/projects/CORERULES/issues/CORERULES-1637

**Rule Information**
- **Standard**: ADaM
- **Rule ID**: 70
- **Rule Description**: A variable with a prefix of TR, containing AG with a suffix of N is present and a variable with the same root without a suffix of N is not present

**Describe the problem**
Cannot check prefixes/suffixes or any arbitrary substring of a variable name in submitted datasets.

Ability to check whether root variable exists in submitted dataset,

**Describe the solution**
A clear and concise description of how this problem could be solved.

Check any variable name (in submitted dataset - not define) for any prefix, suffix or arbitrary string. Check whether root variable is present - see ADaM chk 6 where root variable existence also required.

**Proposed rule logic**
```yaml
A variable with a prefix of TR, containing AG with a suffix of N is present and a variable with the same root without a suffix of N is not present

Check:
all:
- name: variable name #in dataset not define
operator: starts_with
value : 'TR'
- name: variable name #in dataset not define
operator: contains
value : 'AG'
- name: variable name #in dataset not define
operator: ends_with
value : 'N'
- name: variable name #in dataset not define
operator: Root #returns true for exist - false otherwise


(ROOT (variable) #substring(length(variable)-1) -> substring/cut up to 'N' defines root), and check if variable (ROOT) exits!

**Screenshots**
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