fix: unary negation operator with operators: Mul, Div and Mod

[izveigor]

One part of apache/datafusion#6649.
Unary operator does not work correctly with operators: Mul, Div and Mod.
For example (Arrow-Datafusion):

❯ select - 1234 % 12 % 3 * 1545 % 23;
+------------------------------------------------------------------+
| (- Int64(1234) % Int64(12) % Int64(3) * Int64(1545) % Int64(23)) |
+------------------------------------------------------------------+
| -4                                                               |
+------------------------------------------------------------------+
1 row in set. Query took 0.023 seconds.

But should be:

❯ select - 1234 % 12 % 3 * 1545 % 23;
+------------------------------------------------------------------+
| (- Int64(1234) % Int64(12) % Int64(3) * Int64(1545) % Int64(23)) |
+------------------------------------------------------------------+
| -17                                                              |
+------------------------------------------------------------------+
1 row in set. Query took 0.023 seconds.

The main problem is the wrong precedence (See https://github.com/sqlparser-rs/sqlparser-rs/blob/main/src/parser.rs#L797)

[coveralls]

Pull Request Test Coverage Report for Build 5346759290

• 15 of 16 (93.75%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.004%) to 86.904%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tests/sqlparser_common.rs	12	13	92.31%

Totals
Change from base Build 5338035255:	0.004%
Covered Lines:	14951
Relevant Lines:	17204

---

💛 - Coveralls

[alamb]

Thank you @izveigor -- this makes sense to me

[alamb]

I ran this case without any of the code changes in this PR and it fails like the following (aka it is parased as -(a * -b)

---- parse_unary_math_with_multiply stdout ----
thread 'parse_unary_math_with_multiply' panicked at 'assertion failed: `(left == right)`
  left: `BinaryOp { left: UnaryOp { op: Minus, expr: Identifier(Ident { value: "a", quote_style: None }) }, op: Multiply, right: UnaryOp { op: Minus, expr: Identifier(Ident { value: "b", quote_style: None }) } }`,
 right: `UnaryOp { op: Minus, expr: BinaryOp { left: Identifier(Ident { value: "a", quote_style: None }), op: Multiply, right: UnaryOp { op: Minus, expr: Identifier(Ident { value: "b", quote_style: None }) } } }`', tests/sqlparser_common.rs:1100:5
stack backtrace: