Implement TSQL specific function call mapper (databrickslabs#765)

Here, we implement the function call mapper (Rule) that allows us to
make complex transformations from TSQL specific functions into
Databricks compatible constructs. Transformations are sometimes argument
reordering, and sometimes replacement with a different expression.

In this PR we use the transformation of TSQL `DATEADD` to Databricks SQL
`DATE_ADD`, `ADD_MONTHS` and `xxx + INTERVAL n {days|months|etc}`

For example the TSQL:

```tsql
SELECT DATEADD(hh, 7, col1) AS add_hours_col1 FROM tabl;
```

Translates to:

```sql
SELECT col1 + INTERVAL 7 HOUR AS add_hours_col1 FROM tabl;
```

tests/resources/functional/tsql/functions/test_dateadd_hour_1.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(hour, 7, col1) AS add_hours_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 HOUR) AS add_hours_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 HOUR AS add_hours_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_hour_2.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(hh, 7, col1) AS add_hours_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 HOUR) AS add_hours_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 HOUR AS add_hours_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_microsecond_1.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(MICROSECOND, 7, col1) AS add_microsecond_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 MICROSECOND) AS add_microsecond_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 MICROSECOND AS add_microsecond_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_microsecond_2.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(mcs, 7, col1) AS add_microsecond_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 MICROSECOND) AS add_microsecond_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 MICROSECOND AS add_microsecond_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_millisecond_1.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(millisecond, 7, col1) AS add_minutes_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 MILLISECOND) AS add_minutes_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 MILLISECOND AS add_minutes_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_millisecond_2.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(ms, 7, col1) AS add_milliseconds_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 MILLISECOND) AS add_milliseconds_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 MILLISECOND AS add_milliseconds_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_minute_1.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(minute, 7, col1) AS add_minutes_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 MINUTE) AS add_minutes_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 MINUTE AS add_minutes_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_minute_2.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(mi, 7, col1) AS add_minutes_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 MINUTE) AS add_minutes_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 MINUTE AS add_minutes_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_minute_3.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(n, 7, col1) AS add_minutes_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 MINUTE) AS add_minutes_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 MINUTE AS add_minutes_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_nanosecond_1.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(NANOSECOND, 7, col1) AS add_nanoseconds_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 NANOSECOND) AS add_nanoseconds_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 NANOSECOND AS add_nanoseconds_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_nanosecond_2.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(NS, 7, col1) AS add_minutes_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 NANOSECOND) AS add_minutes_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 NANOSECOND AS add_minutes_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_second_1.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(second, 7, col1) AS add_seconds_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 SECOND) AS add_seconds_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 SECOND AS add_seconds_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_second_2.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(ss, 7, col1) AS add_seconds_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 SECOND) AS add_seconds_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 SECOND AS add_seconds_col1 FROM tabl;

tests/resources/functional/tsql/functions/test_dateadd_second_3.sql

@@ -7,4 +7,4 @@
 SELECT DATEADD(s, 7, col1) AS add_minutes_col1 FROM tabl;
 
 -- databricks sql:
-SELECT (col1 + INTERVAL 7 SECOND) AS add_minutes_col1 FROM tabl;
+SELECT col1 + INTERVAL 7 SECOND AS add_minutes_col1 FROM tabl;